Menu Driven Calculator in C

Write a program in C to create 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();

}