using namespace std;

​

double Add(double, double);

double Sub(double, double);

double Mul(double, double);

double Div(double, double);

double Calculator(double , double, double (*func)(double, double));

​

int main(void)

{

    double (*calc)(double, double) = NULL; // 함수 포인터 선언

    double num1 = 3, num2 = 4, result = 0;

    char oper = '*';

    switch (oper)

    {

        case '+' :

            calc = Add;

            break;

        case '-':

            calc = Sub;

            break;

        case '*':

            calc = Mul;

            break;

        case '/':

            calc = Div;

            break;

        default:

            cout << "사칙연산(+, -, *, /)만을 지원합니다.";

            break;

    }

    result = Calculator(num1, num2, calc);

    cout << "사칙 연산의 결과는 " << result << "입니다.";

    return 0;   

}

​

double Add(double num1, double num2)

{

    return num1 + num2;

}

​

double Sub(double num1, double num2)

{

    return num1 - num2;

}

​

double Mul(double num1, double num2)

{

    return num1 * num2;

}

​

double Div(double num1, double num2)

{

    return num1 / num2;

}

​

double Calculator(double num1, double num2, double (*func)(double, double))

{

    return func(num1, num2);

}