include

int main() { char operator; double firstNumber, secondNumber;

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

printf("Enter two operands: ");
scanf("%lf %lf", &firstNumber, &secondNumber);

switch (operator) {
    case '+':
        printf("%.1lf + %.1lf = %.1lf", firstNumber, secondNumber, firstNumber + secondNumber);
        break;
    case '-':
        printf("%.1lf - %.1lf = %.1lf", firstNumber, secondNumber, firstNumber - secondNumber);
        break;
    case '*':
        printf("%.1lf  %.1lf = %.1lf", firstNumber, secondNumber, firstNumber  secondNumber);
        break;
    case '/':
        printf("%.1lf / %.1lf = %.1lf", firstNumber, secondNumber, firstNumber / secondNumber);
        break;
    default:
        printf("Error! operator is not correct");
}

return 0;

}