#include <stdio.h>

int main() {
    char op;
    double a,b;
    printf("enter your operator ('+' '-' '*' '/'): ");
    scanf("%c",&op);
    printf("\nenter two numbers: ");
    scanf("%lf%lf", &a, &b);

    switch (op){
        case'+':
            printf("\n%.1lf+%.1lf=%.1lf", a,b,a+b);
            break;
        case'-':
            printf("\n%.1lf-%.1lf=%.1lf", a,b,a-b);
            break;
        case'*':
            printf("\n%.1lf*%.1lf=%.1lf", a,b,a*b);
            break;
        case'/':
            printf("\n%.1lf/%.1lf=%.1lf", a, b, a/b);
            break;
        default:
            printf("\nenter a valid input");
            break;
    }
        
    return 0;
}