C++ 字符串反转并连接 - 编程练习题

#include <iostream>
#include <cstring>

using namespace std;

int main() {
    char s[31], t[61];
    cin >> s;
    int len = strlen(s);
    for (int i = 0; i < len; i++) {
        t[i] = s[len - i - 1];
    }
    for (int i = 0; i < len; i++) {
        t[i + len] = s[i];
    }
    t[2 * len] = '\0';
    cout << t << endl;
    return 0;
}