第四次Java作业

一，交换二维数组

package 第4次作业;

public class ti1 {
	public static void main(String[] args) {
		  int [][]array= {{91,25,8},{56,14,2},{47,3,67}};
		  System.out.println("——原数组——");
		  for(int i=0;i<3;i++) {
		   for(int j=0;j<3;j++) {
		    System.out.print(array[i][j]+"\t");
		    while(j==2) {
		     System.out.println();break;
		    }
		   }
		  }
		  System.out.println("——置换后的数组——");
		  for(int i=0;i<3;i++) {
		   for(int j=0;j<3;j++) {
		    System.out.print(array[j][i]+"\t");
		    while(j==2) {
		     System.out.println();break;
		    }
		   }
		   }
		  }
	}

 二，查询成绩

package 第4次作业;

import java.util.Scanner;
public class ti2 {
	public static void main(String[] args) {
		  System.out.println("您想调取第几位学生的答题结果（有效数字为1~8）：");//输出信息
		  Scanner sc=new Scanner(System.in);//输入第几位同学
		  int a=sc.nextInt();//将输入的值赋予给a
		  System.out.print("第"+a+"位同学的全部答案为：");//输出信息
		  int sum=0;//定义一个整型变量sum
		  char score[][]=new char[8][10];//定义一个char类型数组并给定行数和列数
		  char arr[]=new char[]{'B',' ','A',' ','D',' ','C',' ','C',' ','B',' ','C',' ','A',' ','D',' ','B'};//给各行分配一维数组
		  score[0]=new char[]{'A','B','C','D','A','C','B','D','A','D'};
		  score[1]=new char[]{'B',' ','A',' ','D',' ','B',' ','A',' ','B',' ','C',' ','A',' ','C',' ','B'};
		  score[2]=new char[]{'B','A','D','B','A','B','C','A','C','B'};
		  score[3]=new char[]{'B','B','C','D','A','C','B','D','A','D'};
		  score[4]=new char[]{'A','B','C','D','A','C','B','D','A','D'};
		  score[5]=new char[]{'A','B','C','D','A','C','B','D','A','D'};
		  score[6]=new char[]{'A','B','C','D','A','C','B','D','A','D'};
		  score[7]=new char[]{'A','B','C','D','A','C','B','D','A','D'};
		  
		   System.out.print(score[a-1]);//输出数组即该同学的答案
		   for (int i = 0; i < 19; i++)//控制循环次数
		   {
		       if (arr[i] == score[a-1][i]){//将两个数组的元素一一对比
		        
		           sum++;//储存正确答案的个数
		           }  
		       }
		    System.out.println();//自动换行
		          System.out.println("第"+a+"位同学一共答对了"+(sum-9)+"道题");//输出信息
	}
 
}