考慮下面的代碼左值：如果您嘗試運行它 #include <iostream>
using namespace std;
class X
{
int i;
public:
X(int ii = 0);
};
X::X(int ii) { i = ii; }
int a;
X f1() { return X(); }
int f2() { return a
規範是重載括號（）運算符來訪問和分配矩陣的元素，但是，我正在努力弄清楚我的重載函數需要返回什麼。 的簡要主： //The .h files and everything has been included, my other functions work just not this one
cout << "Test(): " << endl;
m0(0,0) = 17.25;
m0(1,5