随意把字符整形数字输入，反序输出的程序用DEVC++如何编写

#include <string>
#include <iostream>
using namespace std;

int main()
{
string in;
cin >> in;
string out(in.rbegin(), in.rend());
cout << out;
}

#include <string>
#include <iostream>
#include <iterator>
using namespace std;

int main()
{
string in;
cin >> in;
copy(in.rbegin(), in.rend(), ostream_iterator<char>(cout));
}

#include <iostream>
#include <cstring>
#include <algorithm>
using namespace std;

int main()
{
char in[128];
cin >> in;
reverse(in, in+strlen(in));
cout << in;
}

#include <iostream>
#include <cstring>
#include <algorithm>
#include <iterator>
using namespace std;

int main()
{
char in[128];
cin >> in;
revers