C++ string和int相互转换

int----->string

1.

int a = 10;

char *intStr = itoa(a);
string str = string(intStr);

2.

int a = 10;
stringstream ss;
ss << a;

string str = ss.str();

3.

int myNr = std::stoi(str);  // C++ 11

string------>int

#include <sstream>
// st is input string
int result;
stringstream(st) >> result;