小编Dav*_*ave的帖子

我正在为分数创建模板类，分子和分母的类型可以是int，float或double。当重载算术或关系运算符时，当我尝试添加两个类（例如A类和B类）时，它会给出错误

在头文件“ fraction.h”中

#include<iostream>
using namespace std;

template <class T>
class fraction
{
friend ostream& operator<< <T>(ostream&, const fraction<T>&);
public:
fraction();
fraction<T>(T, T);
friend fraction<T> operator+(const fraction<T>&, const fraction<T>&);
private:
    T numerator;
    T denominator;
};

template <class T>
fraction<T>::fraction()
{
    numerator = 0;
    denominator = 1;
}

template <class T>
fraction<T>::fraction(T num, T denom)
{
    numerator = num;
    denominator = denom;
}
template <class T>
ostream& operator<<(ostream& osObject, const fraction<T>& frac)
{
osObject << frac.numerator << "/" << frac.denominator;
return …