WAP to find sum,difference, and product of two numbers using switch.

//WAP to find sum,difference, and product of two numbers using switch.
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
int choice;
int a,b,output;
printf("please enter your two numbers for a and b for operation\n");
scanf("%d%d",&a,&b);
printf("'now,we have following menu\n");
printf( "1.to get sum\n");
printf("2. to get difference\n");
printf("3 to get product\n");
printf(" any other number to exit");
printf("enter your choice 1 or 2 or 3 or any other number\n");
scanf("%d",&choice);
 switch(choice)
          {
                  case 1:
                            printf("we are going to get sum\n");
                           printf("the sum=%d",a+b);
                 break;
               case 2:
                            printf("we are going to get difference \n");
                           printf("the difference=%d",a-b);
                 break;

               case 3:
                            printf("we are going to get product,\n");
                           printf("the product=%d",a*b);
                 break;
             
              default:
                            printf("sorry, not a valid input\n");
                            printf("thank u, terminating....\n");
          }
getch();
}