## Write C++ Program to Implement Simple Calculator using Do While Loop

// CPP Program to Implement Simple Calculator using Do While Loop

#include <iostream>
#include <stdlib.h>

using namespace std;

int main()
{
int a, b, i;

cout << "Enter Number 1 :--> ";
cin >> a;

cout << "\nEnter Number 2 :--> ";
cin >> b;

do
{
cout << "\nEnter 1 for '+'  ";
cout << "\nEnter 2 for '-'  ";
cout << "\nEnter 3 for '*'  ";
cout << "\nEnter 4 for '/'  \n";
cout << "Enter 0 for Exit ";

cout << "\nEnter your choice :--> ";
cin >> i;

switch(i)
{
case 0: break;

case 1:
cout <<endl<< a << " + " << b << " = " << a + b;
break;

case 2:
cout <<endl<< a << " - " << b << " = " << a - b;
break;

case 3:
cout <<endl<< a << " * " << b << " = " << a * b;
break;

case 4:
cout <<endl<< a << " / " << b << " = " << a / b;
break;

default:
cout << "\nEnter valid option";
}
} while(i != 0);
}

Output:

Enter Number 1 :--> 8

Enter Number 2 :--> 3

Enter 1 for '+'
Enter 2 for '-'
Enter 3 for '*'
Enter 4 for '/'
Enter 0 for Exit

a + b  = 11

Enter 1 for '+'
Enter 2 for '-'
Enter 3 for '*'
Enter 4 for '/'
Enter 0 for Exit

a - b = 5

Enter 1 for '+'
Enter 2 for '-'
Enter 3 for '*'
Enter 4 for '/'
Enter 0 for Exit

a * b = 24

Enter 1 for '+'
Enter 2 for '-'
Enter 3 for '*'
Enter 4 for '/'
Enter 0 for Exit
Enter your choice :--> 0