3172. 整数转换为字符串

#include<iostream>
#include<sstream>
#include<string>
using namespace std;
int main()
{
    long long int num;cin>>num;
    stringstream str;str<<num;
    string s;
    str>>s;cout<<s;
}

#include <stdio.h>
main() {
  char buf[32];
  fgets(buf, 32, stdin);
  fputs(buf, stdout);
}