初学C++，那些乱七八糟的string、char*、const char *很蛋疼，现给出各种字符串的转换方法。

1.string转const char*

string s = "abc";//设置一个字符串

const char* c_s = s.c_str();

2.const char*转string

直接赋值即可

const char* c_s = "abc";

string s(c_s);

3.string转char*

string s = "abc";

char* c;

const int len = s.length();

c = new char[len+1];

strcpy(c,s.c_str());

4.char*转string

char* c = "abc";

string s(c);

5.const char*转char*

const char* cpc = "abc";

char* pc = new char[100];//足够长

strcpy(pc,cpc);

6.char*转const char*

直接赋值即可

char* pc = "abc";

const char* cpc = pc;