分析：主要要做到内容的拷贝，而不止止是指针的拷贝，坑点：1自己给自己赋值2A=B,B里面的指针是空

代码：

class Solution {

public:

    char *m_pData;

    Solution() {

        this->m_pData = NULL;

    }

    Solution(char *pData) {

        this->m_pData = pData;

    }

    // Implement an assignment operator

    Solution operator=(const Solution &object) {

        // write your code here

        if(this==&object)

            return *this;

        if(m_pData&&*m_pData)

            delete m_pData;

        if(object.m_pData==nullptr)

        {

            m_pData = nullptr;

            return *this;

        }

        m_pData = new char[strlen(object.m_pData)+1];

        strcpy(object.m_pData,m_pData);

        m_pData[strlen(object.m_pData)]='\0';

        return *this;

    }

};