C++ note: int to string

import <string>
import <sstream>

using namespace std;

int main() {
...string s;
...int a=1;
...stringstream ss;
...ss << a;
...ss >> s;
}

also, use atoi or strtol for string to int (cstdlib).
use s = c to assign directly from C string to string, and use s.c_str() to get c string from string