c++中数字字符串的转换

1.整数转字符串

#include <sstream>
using namespace std;
int main(){
    int a = 0
    ostringstream os;
    os << a;
    cout << os.str()<<endl; 
    return 0;
}

2.字符串转整数
<cstdlib> atoi()

char str[] = "123456";
int a;
sscanf(str, "%d", &a);

3. String , char* 转换

string str("OK");
char *p =str.c_str();


char *p = "OK";
string str(p);

ps: to_string在用g++编译的时候会出错”to_string was not declared in this scope”,换成上面的方式可以通过g++编译。