c++与c

const char* c_str ( ) const;

Get C string equivalent

Generates a null-terminated sequence of characters (c-string) with the same content as the string object and returns it as a pointer to an array of characters.

A terminating null character is automatically appended.

const char* data() const;

Get string data

Returns a pointer to an array of characters with the same content as the string.

Notice that no terminating null character is appended (see member c_str for such a functionality).

c_str()字符串后有'\0'，而data()没有

简单的const string 转void*

#include <iostream>

using namespace std;

int main()

{

	const string c = "90908080";

	const char* buf = c.c_str();

	char* tmp = const_cast<char*> (buf);

	cout<<buf<<endl;

	cout<<tmp<<endl;

	void* v=reinterpret_cast<void*>(tmp);

	cout<<v<<endl;

	cout<<(char*)(v)<<endl;

   return 0;

}

巴特西

c++与c

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