Laboratory Manual
for
COMPUTER PROGRAMMING AND
UTILISATION
(2110003)
Bachelor of Engineering
SEM I
2014-2015
Shree Swami AtmanandSaraswati Institute of Technology
Shree Swami AtmanandVidyaSankul,
Kapodra, Varachha Road,
Surat – 395006
www.ssasit.org
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
INDEX
Sr.
No.
1.
2.
3.
Name Of Practical
PRACTICAL-SET—1
1.
Write a program to print ―HELLO FRIENDS‖.
2.
Write a program that reads two nos. from key
board and gives their addition, subtraction,
multiplication, division and modulo.
3.
Write a program to convert days into months
and days
4.
Write a program to solve Quadratic Equation.
5.
Write a program to select & print the largest of
the three nos. using Nested-If-Else
PRACTICAL-SET—2
6.
Write a program to display multiplication table
7.
Write
a
program
to
print
1+1/2+1/3+1/4+………+1/N series.
8.
Write a program to find sum of all integers
greater than 100 & less than 200 and are
divisible by 5.
9.
The distance between two cities (In KM) is
input through key board. Write a program to
convert and print this distance in meters, feet,
inches & centimeters.
10. Write a program to find sum of first N odd
numbers.
Ex. 1+3+5+7+………..+N.
PRACTICAL-SET-3
11. Write a program for use of putchar( ) and
getchar( ) function.
12. Program to print Patterns.
*
**
***
****
13. 1 2 3 4 5
2345
345
45
5
14. AAAAA
BBBB
CCC
DD
E
Page
No.
Date Sign
Grade
Computer Programming and Utilisation LAB Manual
15.
4.
5.
6.
7.
1
01
101
0101
PRACTICAL-SET-4
16. Write a program to print Fibonacci series.
0,1,1,2,3,5,……N
17. Write a program to reverse the digit.
18. Add, subtract and multiply two nos. using
switch statement
19. Write a program to add two matrixes
20. Write a program to given no in ascending order.
21. W.A.P to read array of integers and print it in
reverse order
PRACTICAL-SET-5
22. Write a program to count total words in text.
23. Find length of string using strlen( ) function
24. Write a program to copy one string to another
string.
25. Write a program to join two strings.
26. Write a program convert character into Toggle
character.
27. Find given string is palindrome or not using
string library function
PRACTICAL-SET-6
28. Write a function program to add first N
numbers.
29. Write a function find out maximum out of
three numbers.
30. Write a function power that computes x to the
power y for integer x and y and returns double
type value.
31. Write a program to find factorial of a number
using recursion.
32. Write a program that used user defined
function Swap ( ) and interchange the value of
two variable.
33. Write a function prime that return 1 if it„s
argument is prime and return 0 otherwise.
34. Write
a
calculator
program(add,subtract,multiply,divide).
Prepare user defined function for each
operation.
PRACTICAL-SET-7
35. Define a structure type, personal, that would
contain person name, date of joining and salary.
Using this structure, write a program to read
this information for one person from the key
board and print the same on the screen.
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
36.
8.
9.
10.
Define a structure called cricket that will
describe the following information:
a. Player name
b. Team name
c. Batting average
37. Write a function to enter rollno, marks of the
three subject for 3 student and find total
obtained by each student
PRACTICAL-SET-8
38. Write a program using pointer and function to
determine the length of string.
39. Write a program using pointer to compare two
strings.
40. Write a program using pointer to concate two
strings
41. Write a program using pointer to copy one
string to another string.
42. Write a program using pointer to read an array
if integer and print element in reverse order.
PRACTICAL-SET-9
43. Write a program that uses a table of integers
whose size will be specified interactively at run
time.
44. Write a program to store a character string in
block of memory space created by malloc and
then modify the same to store a large string.
PRACTICAL-SET-10
45. A program to illustrate reading files contents.
46. A program to illustrate the use of fgets( ).
47. A program to illustrate the use of fputc ( ) and
fputs( ).
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 1
AIM: Write a program to print ―HELLO FRIENDS.
LOGIC:
This is very basic program of C. First include basic header files and then start
main () function. Write printf function
want to print.
Syntax of printf():
printf(― ‖ , );
OUTPUT:
1
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 2
AIM: Write a program that reads two nos. from key board and gives their
addition, subtraction, multiplication, division and modulo.
LOGIC:
 Declare 2 variables.
 Use “scanf” to take input from users.
 Use the logic to perform addition, subtraction, multiplication and division
of the 2 numbers.
 The modulo operator (%) gives us the reminder when division is
performed between 2 integer numbers.
OUTPUT:
2
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 3
AIM: Write a program to convert days into months and days
LOGIC:
 Take number of days from user.
 Use binary operator(i.e.+-,% etc) to find result
 Print result using printf() function
Note: Consider no of days in a month=30
3
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 4
AIM: Write a program to solve Quadratic Equation.
LOGIC:
 A Quadratic Equation of the form 𝑎𝑥 2 + 𝑏𝑥 + 𝑐 = 0
 Use following formula to find root of the equation
−𝑏 ± 𝑏 2 − 4𝑎𝑐
𝑥=
2𝑎
 Take value of variable a, b & c as input from user and put it in given
equation to find the
 Roots of a quadratic equation
𝑑 = 𝑏 2 − 4𝑎𝑐
−𝑏 + 𝐷
𝑥1 =
2𝑎
−𝑏 − 𝐷
𝑥2 =
2𝑎
Note: To calculate Square root use sqrt function which is defined in math.h
library. You must include this header file before using sqrt
To find root of equation 𝑥 2 + 9𝑥 + 20 = 0
INPUT:
Enter a: 1
Enter b: 9
Enter c: 20
OUTPUT:
First Root is: - 4
Second Root is:- 5
4
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 5
AIM: Write a program to select & print the largest of the three nos. using
Nested-If-Else
LOGIC:
Take three numbers as input from user and use the below logic to find
maximum and minimum of the numbers.
Syntax of nested if
if(){
if(){
}else{
}
}else{
}
OUTPUT:
5
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 6
AIM: Write a program to display multiplication table
LOGIC:
 Take a number from user.
 Use while loop (or any other) to
 Multiply the given number (table) with value of 'i' which increments from
1 to 10.
while(condition){
//Loop body
}
OUTPUT:
6
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 7
SSASIT, Surat
1
1
1
1
2
3
4
𝑁
AIM: Write a program to print 1 + + + + ⋯ +
LOGIC:
 Take no. of terms of series from user.
1.0
 Now apply 𝑠𝑢𝑚 = 𝑠𝑢𝑚 + ; // where sum and i are variable
𝑖
Syntax of for loop
for(initialization; condition; increment/decrement)
{
//Loop body
}
OUTPUT:
7
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 8
AIM: Write a program to find sum of all integers greater than 100 & less than
200 and are divisible by 5.
LOGIC:
 Take start value and end value from user.
 A number is divisible by 5 only when its unit
 From above logic find out series then sum them
OUTPUT:
8
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 9
AIM: The distance between two cities (In KM) is input through key board.
Write a program to convert and print this distance in meters, feet, inches &
centimetres.
LOGIC:
Take distance between two cities in KM.
Now apply conversion logic i.e.
1km=39370 inch
1km=3281 feet
1km=100000 cm
OUTPUT:
9
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 10
SSASIT, Surat
AIM: Write a program to find sum of first N odd numbers. Ex. 1 + 3 + 5 +
7 + ⋯+ 𝑁
LOGIC:
 Take no. of terms of series from user.
 Use loop to print and finding sum of the numbers.
 Increment should be of 2 after each iteration.
 Print sum.
OUTPUT:
10
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 11
AIM: Write a program for use of putchar( ) and getchar( ) function.
LOGIC:
C provides other ways to read and write single characters. In particular, we can
use the getchar() and putchar() functions instead of calling scanf and printf.
putchar() writes a single character:
putchar (ch);
Each time getchar is called, it reads one character, which it returns. In order
Save this character, we must use assignment to store it in a variable:
ch = getchar(); /* reads a character and stores it in ch */
getchar actually returns an int value rather than a char value (the reason will be
discussed in later chapters). As a result, it's not unusual for a variable to have
type int rather than char if it will be used to store a character read by getchar.
Like scanf, getchar doesn't skip white-space characters as it reads. Using
getchar and putchar (rather than scanf and printf) saves lime when theprogram
is executed; getchar and putchar are fast for two reasons. First, they're much
simpler than scanf and printf, which are designed to read and write many kinds
of data in a variety of formats. Second, getchar and putchar are usual
implemented as macros for additional speed.
getchar() has another advantage over scanf: because it returns the character
that it reads, getchar lends itself to various C idioms, including loops that search
for a character or skip over all occurrence of character
OUTPUT:
11
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 12
AIM: Write Program to print Patterns.
*
**
***
****
LOGIC:
 Take Number of rows from
 Now use any loop to print pattern.
Syntax of for loop
for(initialization ;condition ;increment/decrement)
{
//Loop body
}
Syntax for while loop
while(test condition)
{
//loop body
}
OUTPUT:
12
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 13
AIM: Write Program to print Patterns.
12345
2345
345
45
5
LOGIC:
 Take Number of rows from user.
 Now use any loop to print pattern.
OUTPUT:
13
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 14
AIM: Write a program to print following pattern.
AAAAA
BBBB
CCC
DD
E
LOGIC:
 Take Number of rows from user
 Now use any loop to print pattern.
 Use ASCII value of letters to print
 ASCII value of A is 65, B is 66, C is 67, …, Z is 90
OUTPUT:
14
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 15
AIM: Write a program to print following pattern.
1
01
101
0101
LOGIC:
 Take Number of rows from
 Now use any loop to print pattern.
OUTPUT:
15
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 16
AIM: Write a program to print Fibonacci series. 0, 1, 1, 2, 3, 5,……, N
LOGIC:
Numbers of Fibonacci sequence are known as Fibonacci numbers.
In mathematics it is defined by recurrence relation. First few numbers of series
are 0, 1, 1, 2, 3, 5, 8 etc, Except first two terms in sequence every other term is
the sum of two previous terms, For example 5 = 2+ 3 (addition of 2, 3). This
sequence has many applications in mathematics and Computer Science.
 Take Number of terms from user.
Syntax of for loop
for(initialisation ;condition ;increment/decrement)
{
//Loop body
}
Syntax for while loop
while(test condition)
{
//loop body
}
OUTPUT:
16
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 17
AIM: Write a program to reverse the digit.
LOGIC:
 Take any number from user.
 Now use % operator and any loop for finding result.
Syntax:
while(test condition)
{
//body of loop
}
OUTPUT:
17
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 18
AIM: Add, subtract and multiply two nos. using switch statement
LOGIC:
 Take operator from user.
 Syntax for switch case
switch( )
{
case ‗+‘:
//logic for sum
break;
case ‗-‘:
//logic for subtraction
break;
case ‗*‘:
//logic for multiplication
break;
case ‗/‘:
//logic for Division
break;
}
OUTPUT:
18
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 19
AIM: Write a program to add two matrixes.
LOGIC:
Addition of two matrices:
Rule: Addition of two matrices is only possible if both matrices are of same
order.
Suppose two matrices A and B is of same size m X n
Sum of two matrices is defined as
(A + B)ij = Aij + Bij
Where 1 ≤ i ≤ m and 1 ≤ j ≤ n
For example:
Suppose two matrices A and B of size of 2 X 3 is as follow:
𝐴=
B=
A+B=
3+1
2+2
3 2
2 8
5
4
1 3 4
9 3 −6
2+3 5+4
8 + 3 4 + −6
OUTPUT:
19
=
4
5 9
4 11 −2
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 20
AIM: Write a program to given no in ascending order.
LOGIC:
 Ask number of terms from user.
 Now apply sorting logic to sort in increasing (ascending) Order.
Hint: You will have to use nested looping concept for this.
OUTPUT:
Enter total no. of element: 5
Enter 5 elements: 9
1
5
6
2
Ascending order:: 1 2 5 6 9
20
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 21
AIM: W.A.P to read array of integers and print it in reverse order.
LOGIC:
Syntax of array declaration:
Storage _class data _type arrayname[size];
OUTPUT:
Enter size of Array: 5
Enter 5 elements: 25
13
51
69
44
Reverse order:: 44 69 51 13 25
21
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 22
AIM: Write a program to count total words in text.
LOGIC: Here count variable is incremented as and when white space is
detected.
OUTPUT:
22
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 23
AIM: Find length of string using strlen( ) function
LOGIC: The C library function strlen(char *str) computes the length of the
string „str‟ up to but not including the terminating null character.
OUTPUT:
23
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 24
AIM: Write a program to copy one string to another string.
LOGIC: Two string variables are declared and first string is copied character
by character to the second one till null character (\0) is detected.
OUTPUT:
24
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 25
AIM: Write a program to join two strings
LOGIC: Two strings are declared to store the strings and third string is
declared of size twice the size of the first two strings. String1 is first copied
character by character and then second string is copied character by character to
the third string till null character is detected.
OUTPUT:
25
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 26
AIM: Write a program convert character into Toggle character.
LOGIC: To toggle the character means all UPPERCASE characters are
converted to lowercase and vice-versa. Each character has an ASCII value
difference of 32 so accordingly value 32 is added or deducted depending on
whether the case of the character is upper or lower.
OUTPUT:
26
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 27
AIM: Find given string is palindrome or not using string library function
LOGIC: A string is called palindrome if the reverse of that string is same as the
original string. At first we copy the entered string into a new string, and then we
reverse the new string and then compare it with original string. If both of them
have same sequence of characters i.e. they are identical then the entered string is
a palindrome otherwise not.
OUTPUT:
27
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 28
AIM: Write a function program to add first N numbers.
LOGIC:
 Take maximum value of series from user.
 Apply sum of n terms formula of arithmetic progression
OUTPUT:
28
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 29
AIM: Write a function find out maximum out of three numbers.
LOGIC:
 Input 3 number from user
Syntax for declaration of user defined function:
<Return type> function _name( argument)
{
//Function body
}
OUTPUT:
29
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 30
AIM: Write a function power that computes x and returns double type value.
LOGIC:
Syntax for declaration of user defined function:
OUTPUT:
30
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 31
AIM: Write a program to find factorial of a number using recursion.
LOGIC:
Recursion: When a function calls itself again and again is known as
recursion.
 Factorial is represented using '!', so five factorial will be written as (5!), n
factorial as (n!). Also defined as one i.e. 0! = 1.
 Factorial of negative numbers not defined.
OUTPUT:
31
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 32
AIM: Write a program that used user defined function Swap ( ) and interchange
the value of two variables
LOGIC:
 Take two numbers
 You may do swapping without using third variable
a = a + b;
b = a - b;
a = a - b;
OR
x = x ^ y;
y = x ^ y;
x = x ^ y;
Where ^ is XOR Operator.
 Using third Variable
temp= x;
x = y;
y = temp;
OUTPUT:
32
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 33
AIM: Write a function prime that return 1 if it„s argument is prime and return 0
otherwise.
LOGIC:
Prime Number: A number is prime, if it is divisible only by one or itself.
Remember 2 is the only even and also the smallest prime. First few prime
numbers are 2, 3, 5, 7, 11, 13, 17....etc. Prime numbers have many applications
in computer science and mathematics. A number greater than one can be
factorized into prime numbers.
OUTPUT:
33
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 34
AIM: Write a calculator program (add, subtract, multiply, divide). Prepare user
defined function for each functionality.
LOGIC:
Syntax: Function Declaration,
<Return_type> function _name (Parameter List){
//Function body
}
Calling of function::
function_name (Parameter_list);
OUTPUT:
34
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 35
AIM: Define a structure type, personal, that would contain person name, date of
joining and salary. Using this structure, write a program to read this information
for one person from the key board and print the same on the screen.
LOGIC:
 Declare a structure
Syntax is:
struct tagname
{
// Memer1;
// member 2;
//Member n;
} structure Variable;
 Access structure member using .(dot operator) Syntax is::
structure_variable. Member name;
OUTPUT:
35
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 36
AIM: Define a structure called cricket that will describe the following
information:
a. Player name
b. Team name
c. Batting average
LOGIC:
Syntax of structure declaration:
struct tagname
{
Member 1……….
Member 2……….
…………………..
}str_variable;
Taking value from keyboard in structure variable,
str_variable.membername
OUTPUT:
36
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 37
AIM: Write a function to enter roll no, marks of the three subjects for 3 student
and find total obtained by each student
LOGIC:
 Declare structure.
 Make a function to take input by keyboard.
Apply str_var[i].sum+=str_var[i].sub[j];
OUTPUT:
37
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 38
AIM: Write a program using pointer and function to determine the length of
string.
LOGIC:
 Input string from user.
 Define a user defined function to count number of character in the given
string until „\0‟ .you has to increment by 1 value of count each time.
 Function return count(an integer value).
 Call this function in main() to find length of the given string.
OUTPUT:
38
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 39
AIM: Write a program using pointer to compare two strings.
LOGIC:
 Input two string from keyboard.
 Use a for loop to check until null(„\0‟) of two string.
for(;*p!='\0' || *q!='\0';*p++,*q++){
//your logic here
}
OUTPUT:
39
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
EXPERIMENT – 40
AIM: Write a program using pointer to concate two strings
LOGIC:
 Input two string from keyboard.
 Add second string to the end of first string.
 Display on output screen
OUTPUT:
40
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT –41
AIM: Write a program using pointer to copy one string to another string.
LOGIC:
 Input one string from keyboard.
 Define a function to copy given string in new string variable.
 Display the new string variable.
OUTPUT:
41
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 42
AIM: Write a program using pointer to read an array of integer and print
element in reverse order.
LOGIC:
Syntax Of Declaration array:
Storage _class array_name[size];
 Input size of array by user.
 Take integer numbers from user.
 Store in array of integer.
 Apply logic to reverse the numbers.
OUTPUT:
42
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 43
AIM: Write a program that uses a table of integers whose size will be specified
interactively at run time.
LOGIC:
C dynamic memory allocation refers to performing dynamic memory
allocation in the C programming language via a group of functions in the C
standard library, namely malloc, realloc, calloc and free.
Function
malloc()
calloc()
realloc()
free()
Syntax
Stand for
No of
argument
Return value
Description
allocates the specified number of bytes
allocates the specified number of bytes and initializes them to
Zero
increases or decrease the size of the specified block of
memory. Reallocates it if needed
releases the specified block of memory back to the system
malloc()
calloc()
void *malloc(size_t size); void *calloc(size_t nelements, size_t bytes);
Bytes of memory allocation
Blocks of Memory -Allocation
1
2
void pointer (void *)
void pointer (void *)
For Example:
int *ptr = malloc(10 * sizeof (int));
Allocates (10*2=20) 20 bytes of memory and assign first address to pointer
variable ptr.
free(): is used to release the memory.
43
Computer Programming and Utilisation LAB Manual
OUTPUT:
44
SSASIT, Surat
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 44
AIM: Write a program to store a character string in block of memory space
created by malloc() and then modify the same to store a large string.
LOGIC:
C dynamic memory allocation refers to performing dynamic memory
allocation in the C programming language via a group of functions in the C
standard library, namely malloc(), realloc(), calloc() and free().
For Example:
int *ptr = malloc(10 * sizeof(int));
Allocates (10*2=20) 20 bytes of memory and assign first address to pointer
variable ptr.
free(); is used to release the memory.
realloc();
The function realloc() reallocates a memory block with a specific new size. If
you call realloc() the size of the memory block pointed to by the pointer is
changed to the given size in bytes. This way you are able to expand and reduce
the amount of memory you want to use (if available of course.)
Usage of realloc():
void * realloc ( void * ptr, size_t size );
Parameters:
A pointer (ptr) to a previously allocated block of memory. (The memory was
previously allocated with malloc(), calloc() or realloc() functions.) A new size
in bytes for the new memory block.
Return value:
Will return a pointer to the reallocated memory block. If the function fails then
a NULL pointer is returned.
OUTPUT:
45
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 45
AIM: A program to illustrate reading files‟ contents.
LOGIC:
When we request the operating system to a file, what we get back is a
pointer to the structure FILE. That is why; we make the following declaration
before ending the file.
FILE *fp;
open( ) will open a file “SSASIT.txt” in „read‟ mod e, which tells the compiler
that we would be reading the contents of the file. Note that “r” is a string and
not a character; hence the double quotes and not single quotes.
Once the file has been opened for reading using fopen( ), the file‟s contents are
brought into memory and a pointer points to the very first character. To read the
file‟s contents from memory there exists a function called fgetc( ). This has
been used in our sample program through,
ch = fgetc(fp) ;
When we have finished reading from the file, we need to close it. This is done
using the function fclose() through the statement,
fclose ( fp );
//Where fp is file pointer
fopen(―location of file‖, ―Mode‖)
Mode May be r(read mode),w(write mode)etc
OUTPUT:
46
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 46
AIM: A program to illustrate the use of fgets( ).
LOGIC:
The C library function char *fgets(char *str, int n, FILE *stream)
reads a line from the specified stream and stores it into the string pointed to by
str. It stops when either (n-1) characters are read, the newline character is read,
or the end-of-file is reached, whichever comes first.
Syntax of fgets() function:
char *fgets(char *str, int n, FILE *stream)
str -- This is the pointer to an array of chars where the string read is stored.
n -- This is the maximum number of characters to be read (including the
final null-character). Usually, the length of the array passed as str is used.
stream -- This is the pointer to a FILE object that identifies the stream where
characters are read from.
OUTPUT:
47
Computer Programming and Utilisation LAB Manual
SSASIT, Surat
EXPERIMENT – 47
AIM: A program to illustrate the use of fputc( ) and fputs( ).
LOGIC:
Syntax of fputs():
int fputs ( const char * str, FILE * stream );
The function begins copying from the address specified (str) until it reaches the
terminating null character ('\0'). This terminating null-character is not copied to
the stream.
Arguments:
Str: C string with the content to be written to stream.
Stream: Pointer to a FILE objects that identifies an output stream.
Syntax of fputc:
int fputc (int character, FILE * stream );
Writes a character to the stream and advances the position indicator.
The character is written at the position indicated by the internal position
indicator of the stream, which is then automatically advanced by one.
Argument
Character
The int promotion of the character to be written.
The value is internally converted to an unsigned char when written.
Stream
Pointer to a FILE objects that identifies an output stream.
Return Value
On success, the character written is returned.
If a writing error occurs, EOF is returned and the error indicator (ferror) is set.
OUTPUT:
48