1#include "CTurtle.hpp"
2#include <bits/stdc++.h>
3using namespace std;
4using namespace cturtle;
5
6int main() {
7    // 创建一个画布屏幕
8    TurtleScreen scr;
9    // 创建一个画图图标
10    Turtle turtle(scr);
11
12    int bianshu = 16;
13    int bianchang = 20;
14    double jiaodu = 360.0 / bianshu;
15
16    int count = 0;
17    while (count < bianshu) {
18            turtle.forward(bianchang);
19            turtle.right(jiaodu);
20            ++count;
21    }
22
23    // 暂停程序
24    system("pause");
25    // 程序结束
26    return 0;
27}

1#include "CTurtle.hpp"
2#include <bits/stdc++.h>
3using namespace std;
4using namespace cturtle;
5
6int main() {
7    // 创建一个画布屏幕
8    TurtleScreen scr;
9    // 创建一个画图图标
10    Turtle turtle(scr);
11
12    int bianshu = 16;
13    int bianchang = 20;
14    double jiaodu = 360.0 / bianshu;
15
16    int count = 0;
17    do {
18            turtle.forward(bianchang);
19            turtle.right(jiaodu);
20            ++count;
21    } while (count < bianshu);
22
23    // 暂停程序
24    system("pause");
25    // 程序结束
26    return 0;
27}

1#include <bits/stdc++.h>
2using namespace std;
3
4int main() {
5        int n;
6        cin >> n;
7        int sum = 0;
8        int i = n;
9        while (i > 0) {
10                sum += i--;
11        }
12        cout << sum << endl;
13        return 0;
14}

1#include <bits/stdc++.h>
2using namespace std;
3
4int main() {
5        int n;
6        cin >> n;
7        double sum = 0;
8        int i = 1;
9        while (i <= n) {
10                sum += 1.0 / i;
11                ++i;
12        }
13        printf("%.3f", sum);
14        return 0;
15}

1#include <bits/stdc++.h>
2using namespace std;
3
4int main() {
5        int n;
6        cin >> n;
7        int sum = 0;
8        int i = 1;
9        while (i <= n) {
10                sum += i;
11                i += 2;
12        }
13        cout << sum << endl;
14        return 0;
15}

1while (循环条件) {
2    // 若循环条件为真则运行大括号内代码
3    操作1
4    更新循环条件内变量值
5}
6// 若循环条件为假则跳出循环运行后续代码
7操作2

1int n = 100;
2int sum = 0;
3int i = 1;
4while (i <= n) {
5    sum += i;
6    ++i;
7}
8cout << sum << endl;

1do {
2    // 执行下列代码
3    操作1
4    更新循环条件内变量值
5} while (循环条件); //若循环条件为真则重复运行大括号内代码
6// 若循环条件为假则跳出循环运行后续代码
7操作2

1int n = 100;
2int sum = 0;
3int i = 1;
4do {
5    sum += i;
6    ++i;
7} while (i <= n);
8cout << sum << endl;