c_str() 函数

Syntax:
  #include <string>

  const char* c_str();

 

The function c_str() returns a const pointer to a regular C string, identical to the current string. The returned string is null-terminated.

Note that since the returned pointer is of type const, the character data that c_str() returns cannot be modified. Furthermore, you do not need to call free() or delete on this pointer.

c_str函数的返回值是const char*的，不能直接赋值給char*。

c_str()返回一个客户程序可读不可改的指向字符数组的指针，不需要手动释放或删除这个指针。