Java 练习(冒泡排序)

2024 年 05 月 06 日

252 次浏览

214字数

##冒泡
```
package com.xiaohu;

import java.util.Scanner;

public class Test1 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		float[] num = new float[5];
		for(int i=0;i<5;i++) {
			num[i]=sc.nextFloat();
		}
//		[100,20,500,30,400]
//		   0  1  2  3   4
//		
		boolean flag=false;
		int i,j;
		float temp;
		for(i=0;i<num.length-1;i++) {
			for(j=0;j<num.length-i-1;j++) {
				if(num[j]<num[j+1]) {
					temp=num[j];
					num[j]=num[j+1];
					num[j+1]=temp;
					flag=true;
				}
			}
			if(!flag) {
				break;
			}
		}

for(int k=0;k<5;k++) {
			System.out.print(num[k]+"\t");

}
		sc.close();

}

```

##Test1
```
package com.xiaohu;

import java.util.Scanner;

public class Test3 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		float[] scores = new float[5];
		for(int i=0;i<5;i++) {
			scores[i]=sc.nextFloat();
		}		
		float temp=0.0f;
		for(int i=0;i<scores.length-1;i++) {
			for(int j=0;j<scores.length-i-1;j++) {
				if(scores[j]>scores[j+1]) {
					temp=scores[j];
					scores[j]=scores[j+1];
					scores[j+1]=temp;
				}
			}
		}
		
		for(int i=0;i<scores.length;i++) {
			if(scores[i]%2==0) {
				System.out.print(scores[i]+"\t");
			}
		}
		
		sc.close();

}

}
```
##Test2

```
package com.xiaohu;

import java.util.Scanner;

public class Test4 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		float[] scores = new float[5];
		for(int i=0;i<5;i++) {
			scores[i]=sc.nextFloat();
		}
		float temp=0.0f,sum=0.0f,sum1=0.0f;
		for(int i=0;i<scores.length-1;i++) {
			for(int j=0;j<scores.length-i-1;j++) {
				if(scores[j]>scores[j+1]) {
					temp=scores[j];
					scores[j]=scores[j+1];
					scores[j+1]=temp;
				}
			}
		}
		for(int k=0;k<5;k++) {
			System.out.print(scores[k]+"\t");
		}

for(int i=0;i<scores.length;i++) {
			sum+=scores[i];
		}
		sum1=sum-(scores[0]+scores[scores.length-1]);
		System.out.println("总分"+sum1);

sc.close();

}

```
##Test3

```
package com.xiaohu;

import java.util.Scanner;

public class Test5 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		float[] scores = new float[5];
		float[] sum = new float[5];
		float total=0.0f;
		for(int i=0;i<5;i++) {
			scores[i]=sc.nextFloat();
		}
		
		for(int i=0;i<scores.length;i++) {
			sum[i]=scores[i]/2+30;
		}
		
		for(int i=0;i<sum.length;i++) {
			total+=sum[i];
		}
		System.out.println(total);

//		for(int k=0;k<5;k++) {
//			System.out.print(sum[k]+"\t");
//
//		}
		sc.close();

}
}

```
##Test4

```
package com.xiaohu;

import java.util.Scanner;

public class Test6 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		String[] names = new String[5];
		float[] scores = new float[5];
		
		for(int i=0;i<5;i++) {
			System.out.println("第"+(i+1)+"个姓名");
			names[i]=sc.next();
		}
		for(int i=0;i<5;i++) {
			System.out.println("第"+(i+1)+"个总分");
			scores[i]=sc.nextFloat();
		}
		
		float temp=0.0f;
		String t;
		for(int i=0;i<scores.length-1;i++) {
			for(int j=0;j<scores.length-i-1;j++) {
				if(scores[j]>scores[j+1]) {
					temp=scores[j];
					scores[j]=scores[j+1];
					scores[j+1]=temp;
					
					t=names[j];
					names[j]=names[j+1];
					names[j+1]=t;
					
				}
			}
		}
		
		for(int i=0;i<5;i++) {
			System.out.print(names[i]+"\t");
		}
		
		System.out.println("");

for(int i=0;i<5;i++) {
			System.out.print(scores[i]+"\t");
		}
		sc.close();

}
}

```
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Java 练习(冒泡排序)