Calculator program

[Hematirukala]

#include <stdio.h>

void calculator() {
double num1, num2, result;
char op;

printf("Enter an operator (+, -, *, /): ");
scanf(" %c", &op);

printf("Enter two numbers: ");
scanf("%lf %lf", &num1, &num2);

switch (op) {
    case '+':
        result = num1 + num2;
        printf("Result: %.2lf\n", result);
        break;
    case '-':
        result = num1 - num2;
        printf("Result: %.2lf\n", result);
        break;
    case '*':
        result = num1 * num2;
        printf("Result: %.2lf\n", result);
        break;
    case '/':
        if (num2 != 0) {
            result = num1 / num2;
            printf("Result: %.2lf\n", result);
        } else {
            printf("Error! Division by zero is not allowed.\n");
        }
        break;
    default:
        printf("Invalid operator!\n");
}

}

int main() {
calculator();
return 0;
}