C++：string 与 char *，char[ ] 的互相转换

1、string 转 char *

• data()

string s = "asdfr";
const char *c = s.data();

• c_str()

string s = "asdfr";
const char *cc = s.c_str();

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2、string 转 char [ ]

• copy()

string s = "asdfr";
char cc[50];
s.copy(cc, 50, 0);

• 一个一个字符复制

string s = "asdfgh";
int i=0;
char cs[100];
for(; i<s.length(); i++)
    cs[i] = s[i];
cs[i] = '\0';

3、char * 转 string

可以直接赋值

string s;
char *p = "asdff";
s = p;

4、char [ ] 转 string

可以直接赋值

string s;
char p[10] = "asdff";
s = p;