Calculator Program

calculator.c

#include <stdio.h>

int main(int argc, char** argv) {

    double x, y, z, n;
    char a;

    printf("===== Calculator App =====\n\n");
    printf("Choose Operation : \n\n");
    printf("1-Add");
    printf("2-Subtract");
    printf("3-Multiply");
    printf("4-Divide");
    printf("\n\nYour Choice >> ");

    scanf("%d", &x);

    switch(x) {

    case 1:

        printf("Add 2 numbers to Add :\n");

        scanf("%lf", &y);
        scanf("%lf", &z);

        n = y + z;

        printf("Result : %d", n);
        break;

    case 2:

        printf("Add 2 numbers to Subtract :\n");
        scanf("%lf", &y);
        scanf("%lf", &z);

        n = y - z;

        printf("Result : %lf", n);
        break;

    case 3:

        printf("Add 2 numbers to Multiply :\n");
        scanf("%lf", &y);
        scanf("%lf", &z);

        n = y * z;

        printf("Result : %lf", n);
        break;

    case 4:

        printf("Add 2 numbers to Divide :\n");
        scanf("%lf", &y);
        scanf("%lf", &z);

        n = y / z;

        printf("Result : %lf", n);
        break;

    default:

        printf("Invalid");
        break;
    }

    return 0;
}