c++ - C++ EXC_BAD_INSTRUCTION？

Question

写下该类怎么了，它返回以下错误:

EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)

调用operator =时。

class test
{
    int x;
public:
    test()
    {
        this->x=10;
    }

    test(const test& other)
    {
        this->x=other.x;
    }

    test& operator=(const test& other)
    {
        this->x=other.x;
    }

};

Answer 1

您不是从operator=返回。这会引发未定义的行为。

test& operator=(const test& other)
{
   this->x=other.x;
}

您需要做:

test& operator=(const test& other)
{
   this->x=other.x;
   return *this;
}