函数指针实现加法操作

double add(double x, double y)
{
    return x + y;
}

//double (*Calulate)(double, double);//声明一个函数指针


double  Calulate(double x ,double y, double (*Cal)(double, double))
{
    return Cal(x,y);

}

int main()
{
    auto cal = Calulate(1.2,3.4, add);
}