1#include <bits/stdc++.h>
2using namespace std;
3
4int main() {
5        int n;
6        cin >> n;
7        switch (n) {
8                case 1:
9                        cout << "one" << endl;
10                        break;
11                case 2:
12                        cout << "two" <<endl;
13                        break;
14                case 3:
15                        cout << "three" <<endl;
16                        break;
17                case 4:
18                        cout << "four" <<endl;
19                        break;
20                case 5:
21                        cout << "five" <<endl;
22                        break;
23                case 6:
24                        cout << "six" <<endl;
25                        break;
26                case 7:
27                        cout << "seven" <<endl;
28                        break;
29                case 8:
30                        cout << "eight" <<endl;
31                        break;
32                case 9:
33                        cout << "nine" <<endl;
34                        break;
35                default:
36                        cout << "out" << endl;
37        }
38        return 0;
39}

1#include <bits/stdc++.h>
2using namespace std;
3
4int main() {
5        int weight;
6        cin >> weight;
7        weight /= 10;
8//        weight = weight / 10;
9        switch (weight) {
10                case 0:
11                        cout << "A" << endl;
12                        break;
13                case 1:
14                        cout << "B" << endl;
15                        break;
16                case 2:
17                case 3:
18                        cout << "C" << endl;
19                        break;
20                case 4:
21                        cout << "D" << endl;
22                        break;
23                default:
24                        cout << "E" << endl;
25        }
26        return 0;
27}

1#include <bits/stdc++.h>
2using namespace std;
3
4int main() {
5        int a, b, c;
6        cin >> a >> b >> c;
7        int max = (a > b ? a : b) > c ? (a > b ? a : b) : c;
8//        max = max > c ? max : c;
9        cout << max << endl;
10        return 0;
11}

1switch (表达式) {
2    case 数值1:
3        操作1;
4        break;
5    case 数值2:
6        操作2;
7        break;
8    case 数值3:
9        操作3;
10        break;
11    default:
12        默认操作;
13}

1int day;
2cin >> day;
3switch (day) {
4    case 1:
5        cout << "星期一" << endl;
6        break;
7    case 2:
8        cout << "星期二" << endl;
9        break;
10    case 3:
11        cout << "星期三" << endl;
12        break;
13    case 4:
14        cout << "星期四" << endl;
15        break;
16    case 5:
17        cout << "星期五" << endl;
18        break;
19    case 6:
20    case 7:
21        cout << "周末" << endl;
22        break;
23    default:
24        cout << "输入错误" << endl;
25}

1// 语法格式：条件表达式 ? 表达式1 : 表达式2
2// 条件为真 → 返回表达式1
3// 条件为假 → 返回表达式2
4
5int a = 10, b = 20;
6int max_ab = a > b ? a : b; // a > b 为假，返回 b，即 max_ab = 20

1int max_ab;
2if (a > b) {
3    max_ab = a;
4} else {
5    max_ab = b;
6}

int n;
cin >> n;
// 直接在输出中使用三目运算
cout << (n % 2 == 0 ? "偶数" : "奇数") << endl;