#include<stdio.h>
#include<conio.h>

int main(){
    int a,b,opt;
    printf("For sum press : 1 \n For sub press : 2 \n For mul press : 3 \n For div press : 4 \n");
    printf("Plz., choose a option to perform any mathematcal operaton: ");
    again:
    scanf("%d",&opt);

    switch (opt)
    {
    case 1:
        printf("Enter your first no. : ");
        scanf("%d",&a);
        printf("Enter your second no. : ");
        scanf("%d",&b);
        printf("The sum of %d and %d is %d",a,b,(a+b));
        break;

    case 2:
        printf("Enter your first no. : ");
        scanf("%d",&a);
        printf("Enter your second no. : ");
        scanf("%d",&b);
        printf("The sum of %d and %d is %d",a,b,(a-b));
        break;

    case 3:
        printf("Enter your first no. : ");
        scanf("%d",&a);
        printf("Enter your second no. : ");
        scanf("%d",&b);
        printf("The mul of %d and %d is %d",a,b,(a*b));
        break;

    case 4:
        printf("Enter your first no. : ");
        scanf("%d",&a);
        printf("Enter your second no. : ");
        scanf("%d",&b);
        printf("The div of %d and %d is %d",a,b,(a/b));
        break;
    
    
    default:
        printf("Plz., choose a valid option... \n");
        goto again;
        break;
    }
}