97 lines
2.6 KiB
C#
97 lines
2.6 KiB
C#
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using System;
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namespace Lesson03
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{
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class Program
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{
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static void Main(string[] args)
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{
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// ========== if / else ==========
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Console.WriteLine("=== if / else ===");
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int score = 85;
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if (score >= 90)
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{
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Console.WriteLine("优秀");
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}
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else if (score >= 60)
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{
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Console.WriteLine("及格");
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}
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else
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{
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Console.WriteLine("不及格");
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}
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// 三元运算符
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string result = score >= 60 ? "及格" : "不及格";
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Console.WriteLine($"三元运算: {result}");
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// ========== switch ==========
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Console.WriteLine("\n=== switch ===");
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int day = 3;
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switch (day)
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{
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case 1:
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Console.WriteLine("星期一");
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break;
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case 2:
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Console.WriteLine("星期二");
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break;
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case 3:
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Console.WriteLine("星期三");
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break;
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default:
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Console.WriteLine("其他");
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break;
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}
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// ========== for 循环 ==========
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Console.WriteLine("\n=== for 循环 ===");
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for (int i = 0; i < 5; i++)
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{
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Console.WriteLine($"计数: {i}");
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}
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// ========== foreach ==========
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Console.WriteLine("\n=== foreach 循环 ===");
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string[] names = { "无言势", "VRChat", "字幕" };
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foreach (string name in names)
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{
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Console.WriteLine(name);
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}
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// ========== while 循环 ==========
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Console.WriteLine("\n=== while 循环 ===");
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int count = 0;
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while (count < 3)
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{
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Console.WriteLine($"while: {count}");
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count++;
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}
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// ========== do while ==========
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Console.WriteLine("\n=== do while ===");
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int n = 0;
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do
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{
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Console.WriteLine($"do while: {n}");
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n++;
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} while (n < 3);
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// ========== break 和 continue ==========
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Console.WriteLine("\n=== break 和 continue ===");
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for (int i = 0; i < 10; i++)
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{
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if (i == 3) continue; // 跳过 3
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if (i == 7) break; // 退出循环
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Console.WriteLine(i);
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}
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Console.ReadLine();
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}
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}
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}
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