c++初学者错误，家庭作业

Question

我的代码中不断出现这 2 个错误

In function 'int main()':error: invalid initialization of non-const reference of type 'int&' from a temporary of type 'int'error: in passing argument 1 of 'void swapInt(int&, int&)'

但我遇到的真正问题是 swapInt。我需要接受 2 个整数然后用它们的参数切换它们的值，所以曾经是 a 现在是 b曾经的 b 现在是 a。请帮忙!

void swapInt (int &a, int &b);

int main() {
    int a = 1;
    int b = 2;

    swapInt(1, 2);
    cout << a << " " << b;

    return 0;
}

void swapInt (int &a, int &b) {
    int c = a;
    a = b;
    b = c;
    //cout << a << " " << b;
}

Answer 1

您的函数使用变量地址，但您传递的是数字常量。您需要传入以下变量:

void swapInt (int &a, int &b);

int main() {
    int a = 1;
    int b = 2;

    swapInt(a, b);
    cout << a << " " << b;

    return 0;
}

void swapInt (int &a, int &b) {
    int c = a;
    a = b;
    b = c;
    //cout << a << " " << b;
}