char*、const char*、string三者之间的转换

char*、const char*、string三者之间的转换

string和const char*之间的转换

string转const char*

string s = “abc”;
const char* c_s = s.c_str();

const char*转string

const char* c_s = “abc”;
string s(c_s);

string和char*之间的转换

string转char*

string s = “abc”;
char* c;
const int len = s.length();
c = new char[len + 1];
strcpy(c, s.c_str());

char*转string

char* c = “abc”;
string s(c);

char和const char之间的转换

char转const char

char* pc = “abc”;
const char* cpc = pc;

const char转char

const char* cpc = “abc”;
char* pc = new char[strlen(cpc) + 1];
strcpy(pc, cpc);