Question

到目前为止，除此操作员外，其他所有操作员都可以正常工作。运行代码时，出现错误：“错误：后缀'Complex Complex :: operator ++（Complex）'必须采用'int'作为其参数|“

这里是我的代码：

#include<iostream>
#include<iomanip>
using namespace std;

class Complex
{
    friend istream &operator>>(istream&, Complex&);
    friend ostream &operator<<(ostream&, Complex&);

public:
    Complex(float = 0, float = 0);
    Complex operator+ (Complex);
    Complex operator- (Complex);
    Complex operator* (Complex);

问题出现在这里，告诉我参数应该是整数，但是我试图像以前的运算符一样传递Class实例化。

    Complex operator++ (Complex);
private:
    float real, imag;
};

Complex::Complex(float a, float b)
{
    real = a;
    imag = b;
}

Complex Complex::operator+(Complex one)
{
    Complex two;
    two.real = real + one.real;
    two.imag = imag + one.imag;
    return(two);
}

Complex Complex::operator-(Complex one)
{
    Complex two;
    two.real = real - one.real;
    two.imag = imag - one.imag;
    return(two);
}

Complex Complex::operator*(Complex one)
{
    Complex two;
    two.real = (real * one.real) + (imag * one.imag * (-1));
    two.imag = (real * one.imag) + (one.real * imag);
    return(two);
}

Complex Complex::operator++(Complex one)
{
    Complex two;
    two.real = (real * real * real) + (3 * real) * (imag * imag * (-1));
    two.imag = 3 * (real * real)*imag +  (imag * imag *imag * (-1));
    return(two);
}

//Extraction Operator
istream &operator>> (istream &input, Complex &one)
{
    input >> one.real >> one.imag;
}


//Insertion Operator
ostream &operator<<(ostream &output, Complex &one)
{
    output << one.real <<"+"<< one.imag <<"i" << endl;
    return output;
}

//Write stream insertion and extraction operators

int main()
{
Complex c1,c2,c3,sum,diff,prod;
cout << "Enter first complex number: ";
cin >> c1;
cout <<"Enter second complex number: ";
cin >> c2;
cout << "The first complex number is: " <<c1;
cout <<"The second complex number is: " <<c2;
sum = c1 + c2;
cout<<"The sum is: " <<sum;
diff = c1 - c2;
cout<<"The difference is: " <<diff;
prod = c1*c2;
cout<<"The product is: " <<prod;

if (c1==c2)
    cout <<"Equal";
if (c1!=c2)
    cout <<"Not equal";

//Cube function is the ++ operator
cout << "Preincrement: " <<++c1<<++c2;
cout << "Postincrement: " <<c1++<<c2++;
cout << "After post increment: "<<c1<<c2;
*/
return 0;
}

Answer 1

您需要使用void atomicLeftShift(atomic<int>& var, int shiftBy) { While(true) { int oldVal = var; int newVal = oldVal << shiftBy; if(var.compare_exchange_weak(oldVal, newVal)); break; else _mm_pause(); } }或(int)作为()的后缀。这将告诉编译器您是否希望operator++运算符为前置或后缀。即++或int++。

这只是一种特质。

++int

尝试在C ++中重载增量运算符

1 个答案: