C Program For Menu Driven Application using Switch Case

Program 1

// Menu driven application using switch case
#include<stdio.h>
#include<conio.h>
int main()
{
    int a,b,c,choice;
    printf("\n---------------------Menu------------------\n");
    printf("\n 1.Addition\n2.Subtraction\n 3.Swaping\n");
    printf("\n---------------------------------------------\n");
    printf("\nEnter your choice");
    scanf("%d",&choice);
    switch(choice)
    {
         case 1:
         {
            printf("\nEnter two number");
            scanf("%d%d",&a,&b);
            c=a+b;
            printf("Addition of %d and %d is %d",a,b,c);
            break;
         }
        case 2:
         {
            printf("\nEnter two number");
            scanf("%d%d",&a,&b);
            c=a-b;
            printf("Subtraction of %d and %d is %d",a,b,c);
            break;
         }
        case 3:
         {
            printf("\nEnter two number");
            scanf("%d%d",&a,&b);
            printf("Beore swaping %d %d",a,b);
              a=a+b;
              b=a-b;
              a=a-b;
            printf("After swaping %d %d",a,b); 
         }
         default:printf("Invalid choice pls enter from 1 to 3 only ");

    }



    return 0;
}