Lab Exercise :
Write a program that print the final price of purchase at a store where
everything costs exactly one dollar. Ask for the number of items
purchased. Compute a sales tax of:
 8 percent if the users purchase is less than $100
 7.5 percent if the purchase is greater or equal to $100.
Also if the purchase is over $500, give the customer an additional 10
percent after-tax discount.
Print the purchase price, the amount of
tax, the amount of the discount ($0.00 if no discount applies) and the
total price.
Output:
Enter number of items purchased= 60
the purchase price= 60 $
the amount of tax= 4.8 $
the amount of the discount= 0.00$
the total price= 64.8 $
Enter number of items purchased= 510
the purchase price= 510$
the amount of tax= 38.25$
the amount of the discount= 54.82$
the total price= 493.42$
void main()
{
int i;
float price,tax,d=0,TP;
cout<<"enter the no. of items = ";
cin>>i;
price=i;
if(price>0)
{
if(price<100)
tax= price * .08;
else
tax= price * .075;
if(price+tax>500)
d=(price + tax)*10/100;
TP=price+tax-d;
cout<<“ the purchase price= "<<price<<'$';
cout<<"\n\n the amount of tax= "<<tax<<'$';
cout<<"\n\n the amount of the discount= "<<d<<'$';
cout<<"\n\n the total price= "<<TP<<'$';
}
else
{
cout<<"wrong entry";
}
getch();
}
Exercise :
Write a program that request the user’s language and then print a
greeting in that language.
Output:
Engl. , Fren. , Ger. , Ital. , or Rus. ? (e,f,g,i,r):e
Welcome
Where the greeting will be:
English="Welcome"
France="Bon jour"
Germany=“Guten"
Italian=“Bon giorno"
Russian="Dobre utre";
Other language=“Sorry, we don't speak your language";
Void main()
{
char language;
cout<< "Engl. , Fren. , Ger. , Ital. , or Rus. ? (e,f,g,i,r): ";
cin>>language;
if (language=='e')
cout<<"Welcome";
else if (language=='f')
cout<<"Bon jour";
else if (language=='g')
cout<<"Guten";
else if (language=='i')
cout<<"Bon giorno";
else if (language=='r')
cout<<"Dobre utre";
else
cout<<"Sorry, we don't speak your language";
getch();
}
Exercise
:
 and write a c++ program that reads an integer number of two digits,
then display each digit in a separate line after checking that the
number consists of only two digits, otherwise display an appropriate
message.
output:
 Enter number of tow digits =13
 3
 1
 Enter number of tow digits =684
 Wrong Entry
void main()
{
int num;
cout<<"Please enter an integer number of two digits :";
cin>>num;
if((num>=10) && (num<100))
{
d1=num%10;
d2=num/10;
cout<<d1<<endl<<d2;
}
else
cout<<“Wrong Entry";
getch();
}
Exercise:
Write a program that reads a six-digits integer and prints the sum of its
six digits. Use the quotient operator ( / ) and the reminder operator (%)
to extract the digits from the integer.
Output:
Enter a six-digit integer: 342571
The sum of the digits of 34257 is 22
void main()
{
int n ,sum ;
cout<<" Enter a six-digit integer :";
cin>>n;
sum = n%10 + (n/10)%10 + (n/100)%10 + (n/1000)%10 + (n/10000)%10 + n/100000 ;
cout<<“ The sum of the digits of “<< n <<” is: “<< sum;
getch();
}
Exercise:
Write a program that reads a character and determine if it is a vowel
letter or not .
vowel letters =(a , e , I , o , u)
Output:
ENTER any character: a
a is a vowel letter.
Output:
ENTER any character: t
t is not a vowel letter.
void main()
{
char le;
cout<<"ENTER any character:";
cin>>le;
switch(le)
{
case 'a':
case 'e':
case 'i':
case 'o':
case 'u': cout<<le<<" is a vowel letter.";
break;
default : cout<<le<<" is not a vowel letter.";
}
getch();
}
Exercise:
Output:
- Square (sq)
- Cube (c)
-Squareroot (sr)
- power (p)
ENTER YOUR CHIOCE: sq
enter your number: 2
4
- Square (sq)
- Cube (c)
- Squareroot (sr)
- power (p)
ENTER YOUR CHIOCE: p
enter tow numbers: 2 3
8
#include<iostream.h>
#include<conio.h>
#include<math.h>
#include<stdio.h>
void main()
{ char choice[3];
float x,y,z;
cout<<"Square (sq)\n";
cout<<"Cube (c)\n";
cout<<"Squareroot (sr)\n";
cout<<"power (p)\n";
cout<<"ENTER YOUR CHIOCE:";
gets(choice);
switch(choice[0])
{
case 's':
case 'S': switch(choice[1])
{
case 'q':
case 'Q':cout<<"enter your number:";
cin>>x;
z=x*x;
cout<<z;
break;
case 'r':
case 'R': cout<<"enter your number:";
cin>>x;
z=sqrt(x);
cout<<z;
break;
default : cout<<"error in index[1]";
}
break;
case 'c':
case 'C':
cout<<"enter your number:";
cin>>x;
z=x*x*x;
cout<<z;
break;
case 'p':
case 'P':
cout<<"enter tow numbers:";
cin>>x>>y;
z=pow(x,y);
cout<<z;
break;
default : cout<<"error";
}
getch();
}