【GESP】C++一级练习BCQM3036，数字交换，国庆七天乐

1#include <iostream>
2using namespace std;
3int main() {
4    int a;
5    cin >> a;
6    // b十位 ,c个位。
7    int b, c;
8    b = a / 10;
9    c = a % 10;
10    int d;
11    d = c * 10 + b;
12    cout << d;
13    return 0;
14}

1#include <iostream>
2using namespace std;
3int main() {
4    int a;
5    cin >> a;
6    int b, c, d;
7    b = a / 100;
8    c = a % 100 / 10;
9    d = a % 100 % 10;
10    int e;
11    e = d * 100 + c * 10 + b;
12    cout << e;
13    return 0;
14}