Menu Driven Calculator

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c,ch;

clrscr();

printf(“\n1.add\n2.subtract\n3.multiply\n4.division\n5.remainder\n);

printf(“\nenter your choice\n”);

scanf(“%d”,&ch);

switch(ch)

{

case1:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a+b;

printf(“\nthe answer is %d”,c);

break;

case2:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a-b; 

printf(“\nthe answer is %d”,c);

break;

case3:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a*b; 

printf(“\nthe answer is %d”,c);

break;

case4:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a/b; 

printf(“\nthe answer is %d”,c);

break;

case5:

printf(“\nenter values of a and b\n”);

scanf(“%d%d”,&a,&b);

c=a%b; 

printf(“\nthe answer is %d”,c);

break;

default:

printf(“\nenter the correct choice”);

break;

}

getch();

}

Output:

1.add

2.subtract

3.multiply

4.division

5.remainder

enter your choice

2

enter the values  of a and b

7

4

the answer is 3