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Java入门（第四章）- 分支结构.txt

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+1.Java分支结构之 if...else
+package step2;
+
+import java.util.Scanner;
+
+public class HelloIfStep2 {
+	public static void main(String[] args) {
+		Scanner input = new Scanner(System.in);
+		/******start******/
+        int score;
+		System.out.println("请输入学员成绩：");
+		score=input.nextInt();
+        if(score>=85 && score<=100) 
+        {
+        System.out.print("优，非常棒！");
+        }
+        else 
+        {
+        System.out.print("良，下次加油！");
+        }
+        
+		
+		
+		
+		/******end******/
+	}
+}
+2.Java分支结构之Switch
+package step4;
+
+import java.util.Scanner;
+
+public class HelloSwitch {
+	public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in);
+		
+		System.out.println("请输入月份：");
+		
+		int input = sc.nextInt();	//获取输入的月份
+		
+        //通过输入的月份来判断当前季节并输出
+		/*****start*****/
+		int season;
+        switch(input)
+        {
+            case 1:
+            System.out.print("1月是冬天");
+            break;
+            case 2:
+            System.out.print("2月是冬天");
+            break;
+            case 3:
+            System.out.print("3月是春天");
+            break;
+            case 4:
+            System.out.print("4月是春天");break;
+            case 5:
+            System.out.print("5月是春天");
+            break;
+            case 6:
+            System.out.print("6月是夏天");
+            break;
+            case 7:
+            System.out.print("7月是夏天");
+            break;
+            case 8:
+            System.out.print("8月是夏天");
+            break;
+            case 9:
+            System.out.print("9月是秋天");
+            break;
+            case 10:
+            System.out.print("10月是秋天");
+            break;
+            case 11:
+            System.out.print("11月是秋天");
+            break;
+            case 12:
+            System.out.print("12月是冬天");
+            	break;
+        }
+
+		
+		/*****end*****/
+		
+	}
+}
+3.Java分支结构之多重if
+package step3;
+
+import java.util.Scanner;
+
+public class HelloStep3 {
+	public static void main(String[] args) {
+		System.out.println("星级成绩评定系统");
+		System.out.println("请输入成绩：");
+		Scanner sc = new Scanner(System.in);
+		/******start******/
+     int score;
+        score=sc.nextInt();
+        if(score>=90&&score<=100)
+        {
+            System.out.print("*****五星成绩");
+        }
+        else if(score<90&&score>=80)
+        {
+            System.out.print("****四星成绩");
+        }
+		else if(score<80&&score>=70)
+        {
+            System.out.print("***三星成绩");
+
+        }
+		else if(score<70&&score>=60)
+        {
+            System.out.print("**俩星成绩");
+        }
+        else if(score<60)
+        {
+            System.out.print("无星成绩");
+        }
+		
+		
+		
+		
+		/******end******/
+	}
+}
+4.来吧，我是BOSS！
+package step5;
+
+import java.util.Scanner;
+
+public class Practice {
+    
+    	final static Scanner sc = new Scanner(System.in);	//创建扫描仪
+
+		//第一题
+		public void first(){
+			System.out.println("请输入人数：");
+            int input = sc.nextInt();		//获取输入的数据
+            
+			/*****start*****/
+			
+			 if (input<10)
+             {
+                System.out.println("打半场");
+            }
+            else
+            {
+                System.out.println("打全场");
+            }
+			
+			
+			
+			/*****end*****/
+		}
+		
+		//第二题
+		public void second(){
+			System.out.println("请输入今天星期几：");
+            int input = sc.nextInt();		//获取输入的数据
+            
+			/*****start*****/
+ if (input==1)
+ {
+                System.out.println("今天吃米饭");
+            }
+            else if(input==2) 
+            {
+                System.out.println("今天吃牛排");
+            }
+            else if(input==3) 
+            {
+                System.out.println("今天吃鸡排");
+            }
+            else
+            {
+                System.out.println("今天吃红烧肉");
+            }
+
+			
+
+			
+			/*****end*****/
+		}	
+		
+		//第三题
+		public void third(){
+			System.out.println("请输入今天星期几：");
+            int input = sc.nextInt();		//获取输入的数据
+            
+			/*****start*****/
+            switch (input)
+            {
+                case 1:
+                System.out.println("今天吃米饭");
+                break;
+                case 2:
+                System.out.println("今天吃牛排");
+                break;
+                case 3:
+                System.out.println("今天吃鸡排");
+                break;
+                default:
+                System.out.println("今天吃红烧肉");
+                break;
+                
+            }
+
+			
+			
+			/*****end*****/
+		}
+}