cal

#include "stdio.h"
#include "stdlib.h"
#include "conio.h"
int a,b;
int ans;
void main()
{
    printf("Enter number 1 :");
    scanf("%d",&a);
    printf("Enter number 2 :");
    scanf("%d",&b);

    printf("1. + \n");
    printf("2. - \n");
    printf("3. * \n");
    printf("4. / \n");
    scanf("%d",&ans);
    clrscr();

    switch(ans)
    {
        case 1 :
            printf("%d + %d = %d\n",a,b,a+b);
        break;
        case 2 :
            printf("%d - %d = %d\n",a,b,a-b);
        break;
        case 3 :
            printf("%d * %d = %d\n",a,b,a*b);
        break;
        case 4 :
            printf("%d / %d = %d\n",a,b,a/b);
        break;
        default :
            printf("Error!!!");
        break;
    }
}