冒泡排序

冒泡排序例子：

• 比如说现在有abcd三个值
• 然后a和b比较，如果a大于b则继续去和c比较如果又大于c那就继续去和d比较
• 然后第二轮接着b和c去比较，如果b又大于c就继续和d比较
• 然后就是c和d比较
• 如图效果

   

写法例子：

int arr[]=new int[10];
    int a=0;
    Scanner input=new Scanner(System.in);
    for (int i = 0; i < arr.length; i++) {
      System.out.print("请输入第"+(i+1)+"个元素：");
      a=input.nextInt();
      arr[i]=(int) a;
    }
    System.out.println("初始数据=");
    for (int i = 0; i < arr.length; i++) {
      System.out.print(arr[i]);
    }
    for (int i = 0; i < arr.length; i++) {
      
      for (int j = 0; j < arr.length; j++) {
        if (arr[i]<arr[j]) {
          int arr1[]= {0};
          arr1[0]=arr[i];
          arr[i]=arr[j];
          arr[j]=arr1[0];
        }
      }
    }
    System.out.println("\n处理后数据=");
    for (int i = 0; i < arr.length; i++) {
      System.out.print(arr[i]);
    }
int arr[]=new int[10];
    int a=0;
    Scanner input=new Scanner(System.in);
    for (int i = 0; i < arr.length; i++) {
      System.out.print("请输入第"+(i+1)+"个元素：");
      a=input.nextInt();
      arr[i]=(int) a;
    }
    System.out.println("初始数据=");
    for (int i = 0; i < arr.length; i++) {
      System.out.print(arr[i]);
    }
    for (int i = 0; i < arr.length; i++) {
      
      for (int j = 0; j < arr.length; j++) {
        if (arr[i]<arr[j]) {
          int arr1[]= {0};
          arr1[0]=arr[i];
          arr[i]=arr[j];
          arr[j]=arr1[0];
        }
      }
    }
    System.out.println("\n处理后数据=");
    for (int i = 0; i < arr.length; i++) {
      System.out.print(arr[i]);
    }
int arr[]=new int[10];
		int a=0;
		Scanner input=new Scanner(System.in);
		for (int i = 0; i < arr.length; i++) {
			System.out.print("请输入第"+(i+1)+"个元素：");
			a=input.nextInt();
			arr[i]=(int) a;
		}
		System.out.println("初始数据=");
		for (int i = 0; i < arr.length; i++) {
			System.out.print(arr[i]);
		}
		for (int i = 0; i < arr.length; i++) {
			
			for (int j = 0; j < arr.length; j++) {
				if (arr[i]<arr[j]) {
					int arr1[]= {0};
					arr1[0]=arr[i];
					arr[i]=arr[j];
					arr[j]=arr1[0];
				}
			}
		}
		System.out.println("\n处理后数据=");
		for (int i = 0; i < arr.length; i++) {
			System.out.print(arr[i]);
		}

重点是这一块

for (int i = 0; i < arr.length; i++) {
      
      for (int j = 0; j < arr.length; j++) {
        if (arr[i]<arr[j]) {
          int arr1[]= {0};
          arr1[0]=arr[i];
          arr[i]=arr[j];
          arr[j]=arr1[0];
        }
      }
    }
for (int i = 0; i < arr.length; i++) {
      
      for (int j = 0; j < arr.length; j++) {
        if (arr[i]<arr[j]) {
          int arr1[]= {0};
          arr1[0]=arr[i];
          arr[i]=arr[j];
          arr[j]=arr1[0];
        }
      }
    }
for (int i = 0; i < arr.length; i++) {
			
			for (int j = 0; j < arr.length; j++) {
				if (arr[i]<arr[j]) {
					int arr1[]= {0};
					arr1[0]=arr[i];
					arr[i]=arr[j];
					arr[j]=arr1[0];
				}
			}
		}