The University of Babylon
Department of Software
LECTURE NOTES ON PROGRAMMING
FUNDAMENTALS II USING C++ LANGUAGE
By
Dr. Samaher Hussein Ali
Collage of Information Technology, University of Babylon, Iraq
dr.samaher.hussein@gmail.com
31 March 2013
1
Examples of Functions
Q1// program find the root of integer number enter by user
#include<iostream.h>
#include<math.h>
#include<conio.h>
float root(int x)
{
float y;
y=sqrt(x);
return y;
}
void main()
{
clrscr();
int x;
cout<<"enter the number to find root to it"<<endl;
cin>>x;
cout<<root(x)
}
31 March 2013
Dr. Samaher Hussein Ali
2
Examples of Functions
Q2//program find the factorial of integer number enter by user
#include<iostream.h>
#include<conio.h>
int fact(int x)
{
int y=1;
for(int i=1;i<=x;i++)
{
y=y*i;
cout<<i<<"*";
}
return y;
}
void main()
{
clrscr();
int x;
cout<<"enter the number to find factorial to it"<<endl;
cin>>x;
cout<<"factoria of "<<x<<"=";
cout<<"="<<fact(x);
}
31 March 2013
Dr. Samaher Hussein Ali
3
Examples of Functions
Q3//program generat random number the array
#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
void rand_function(int n)
{
int seed,x[100];
seed=time(NULL);
srand(seed);
for(int i=0;i<n;i++)
{
x[i]=random(10);
cout<<x[i];
}
}
void main()
{
int n;
cout<<"enter the length of array:"<<endl;
cin>>n;
rand_function(n);
}
31 March 2013
Dr. Samaher Hussein Ali
4
Examples of Functions
Q4//program cancel repeat number in array
#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
int x[100];
void cancel_repeat(int n)
{
for (int i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if (x[i]==x[j])
x[j]=0;
}
void main()
{
int n;
cout<<"enter the length of array:"<<endl;
cin>>n;
cout<<"enter the arry"<<endl;
for(int i=0;i<n;i++)
cin>>x[i];
cancel_repeat(n);
for(i=0;i<n;i++)
{
if(x[i]!=0)
cout<<x[i]<<" "; } }
31 March 2013
Dr. Samaher Hussein Ali
5
Examples of Functions
Q5//program print the number in array that accept divided on it
#include<iostream.h>
#include<conio.h>
int x[100],a[50];
void divition_function(int n)
{
for (int i=0;i<n;i++)
{
int count=0;
for(int j=0;j<n;j++)
if (x[j]%x[i]==0)
count++;
a[i]=count;
}
}
void main()
{
int n;
cout<<"enter the length of array:"<<endl;
cin>>n;
cout<<"enter the arry"<<endl;
for(int i=0;i<n;i++)
cin>>x[i];
divition_function(n);
for(i=0;i<n;i++)
{
if(a[i]==n)
cout<<x[i]<<"the array accept divided on it "<<endl;
else
cout<<x[i]<<"no accept divition array on it"<<endl;
}
31 March 2013
Dr. Samaher Hussein Ali
6
Examples of Functions
Q6//program print sum of 1......x
#include<iostream.h>
#include<conio.h>
int sumation(int n)
{
int sum=0;
for (int i=1;i<=n;i++)
sum=sum+i;
return sum;
}
void main()
{
int x;
cout<<"enter the integer number"<<endl;
cin>>x;
cout<<"the sumation of "<<x<<endl;
cout<<sumation(x);
}
31 March 2013
Dr. Samaher Hussein Ali
7
Examples of Functions
Q7 // write the function to find the power
#include<iostream.h>
#include<conio.h>
int power(int m,int n)
{
int f=1;
for(int i=0;i<n;i++)
f=f*m;
return f;
}
void main()
{
clrscr();
cout<<power(2,10);
getch();
}
31 March 2013
Dr. Samaher Hussein Ali
8
Examples of Functions
Q8 //check number is prime or not
#include<iostream.h>
#include<conio.h>
int prime(int n)
{
int f=1;
for(int i=2;i<n-1;i++)
if(n%i==0)
f=0;
return f;
}
void main()
{
clrscr();
int x=prime(20);
if(x==0)
cout<<"not prime";
else
cout<<"prime";
getch();
}
31 March 2013
Dr. Samaher Hussein Ali
9
Examples of Functions
Q9//write fuction to find the series of febonatshi
#include<iostream.h>
#include<conio.h>
void febonatshi(int n)
{
int x=0,y=1,z;
for(int i=0;i<n;i++)
{
z=x+y;
x=y;
y=z;
cout<<z<<" ";
}
}
void main()
{
clrscr();
febonatshi(10);
getch();
31 March 2013
Dr. Samaher Hussein Ali
10
Examples of Functions
Q10 //find factorial from number
#include<iostream.h>
#include<conio.h>
inline int factoral(int n)
{
int f=1;
for(int i=1;i<=n;i++)
f=f*i;
return f;
}
void main()
{
clrscr();
cout<<factoral(4);
getch();
}
31 March 2013
Dr. Samaher Hussein Ali
11
Examples of Functions
Q11 //check the number if even or odd
#include<iostream.h>
#include<conio.h>
void even_odd(int n)
{
if(n%2==0)
cout<<"even";
else
cout<<"odd";
}
void main()
{
clrscr();
even_odd(993);
getch();
}
31 March 2013
Dr. Samaher Hussein Ali
12
Examples of Functions
Q12//find the max number from 10 number
#include<iostream.h>
#include<conio.h>
int max_number(int n)
{
int x;
cin>>x;
int max=x;
for(int i=1;i<n;i++)
{
cin>>x;
if(x>max)
max=x;
}
return max;
}
void main()
{
clrscr();
cout<<"max="<<max_number(4);
getch();
}
31 March 2013
Dr. Samaher Hussein Ali
13
Spatial Functions
1. Strlen(S1)
Output the length of Sequence
ex: char s[10]
s=“ali”
int y==strlen(s)
2. Strcmp(S1,S2)
Use to compare between two string from the similarity code of spatial chat
3. Strcpy(S1,S2)
Copy the contain of string and put it on the second string.
4. Strlwr(s1)
Covert the upper letter of sting to lower
5. Strcat(S1,S2)
To merge between two sequences
6. Strrev(S1)
Use to reverse the order of letter in sequence
31 March 2013
Dr. Samaher Hussein Ali
14