Calculator

#include <stdio.h>

int main() {

    char operator;

    double first, second;

    printf("Enter an operator (+, -, *,): ");

    scanf("%c", &operator);

    printf("Enter two operands: ");

    scanf("%lf %lf", &first, &second);

    switch (operator) {

    case '+':

        printf("%.1lf + %.1lf = %.1lf", first, second, first + second);

        break;

    case '-':

        printf("%.1lf - %.1lf = %.1lf", first, second, first - second);

        break;

    case '*':

        printf("%.1lf * %.1lf = %.1lf", first, second, first * second);

        break;

    case '/':

        printf("%.1lf / %.1lf = %.1lf", first, second, first / second);

        break;

        // operator doesn't match any case constant

    default:

        printf("Error! operator is not correct");

    }

    return 0;

}