C++ 为什么这段代码不能正常工作？？？我的意思是，为什么我运行它时它没有显示任何内容？

重载方法有什么问题吗？我真的认为它应该有效，但它没有

//重载运算符==

BIGINT& BIGINT::operator==(const BIGINT& bn)
{
    for (int i = 0;i < big_number.size();i++)
    {
        big_number[i] == bn.big_number[i];
    }
    return *this;
}

---

//重载运算符这是对计算资源的浪费：

for (int i = 0;i < big_number.size();i++)
{
    big_number[i] == bn.big_number[i];
}
return *this;

循环在找到第一组不相等的插槽时终止。搜索数组的其余部分没有意义。只要有一个不等式就可以证明等式是错误的

编辑1：容器的长度是否相等 要使容器相等，它们必须具有相同的大小或相同的元素数

因此，等式函数现在变为：

bool BIGINT::operator==(const BIGINT& bn)
{
    if (big_number.size() != bn.big_number.size())
    {
        return false;
    }
    for (int i = 0;i < big_number.size();i++)
    {
        if (big_number[i] != bn.big_number[i])
        {
            return false;
        }
    }
    return true;
}

---

哦，天哪，文字之墙。当您在调试器中通过它时发生了什么？请创建一个调试器并将您的问题包含在内。这是许多不相关的代码。调试器。使用调试器。或者使用古老的打印语句调试艺术。具体来说，哪种语句不起作用？实际价值是多少？期望值是多少？复制问题的输入是什么？我认为屏幕上应该显示125，而不是-@托马斯马修斯

BIGINT& BIGINT::operator+=(const BIGINT& bn) 
{
    int size;
    int k = 0;
    if (bn.big_number.size()>big_number.size()) size = big_number.size();
    else size = bn.big_number.size();
    for (int i = size - 1;i > 0;i--)
    {
        if (k)
        {
            if (big_number[i] + bn.big_number[i]>9)
            {
                big_number[i] = big_number[i] + bn.big_number[i] - 10 + 1;
                k = 1;
            }
            else
            {
                big_number[i] = big_number[i] + bn.big_number[i] + 1;
                k = 0;
            }
        }
        else
        {
            if (big_number[i] + bn.big_number[i]>9)
            {
                big_number[i] = big_number[i] + bn.big_number[i] - 10;
                k = 1;
            }
            else
            {
                big_number[i] = big_number[i] + bn.big_number[i];
                k = 0;
            }
        }

    }
    return *this;
}

BIGINT& BIGINT::operator==(const BIGINT& bn)
{
    for (int i = 0;i < big_number.size();i++)
    {
        big_number[i] == bn.big_number[i];
    }
    return *this;
}

ostream& operator<<(ostream& out, const BIGINT& bn)
{
    for (int i = 0;i < bn.big_number.size();i++)
    {
        out << bn.big_number[i];
    }
    return out;
}

int main()
{
    BIGINT a(123);
    BIGINT b(2);
    BIGINT c;
    c = a + b;
    cout << c << endl;
    system("pause");
    return 0;
}

for (int i = 0;i < big_number.size();i++)
{
    big_number[i] == bn.big_number[i];
}
return *this;

bool BIGINT::operator==(const BIGINT& bn)
{
    for (int i = 0;i < big_number.size();i++)
    {
        if (big_number[i] != bn.big_number[i])
        {
            return false;
        }
    }
    return true;
}

bool BIGINT::operator==(const BIGINT& bn)
{
    if (big_number.size() != bn.big_number.size())
    {
        return false;
    }
    for (int i = 0;i < big_number.size();i++)
    {
        if (big_number[i] != bn.big_number[i])
        {
            return false;
        }
    }
    return true;
}