include

int main() { float num1, num2, result; char operator;

printf("Enter first number: ");
scanf("%f", &num1);

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

printf("Enter second number: ");
scanf("%f", &num2);

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

return 0;

}