数组

数组

• 有一个数列：8，4，2，1，23，344，12

猜数游戏：从键盘中任意输入一个数据，判断数列中是否包含此数

 int[] array={8,4,2,23,344,12};
        Scanner input = new Scanner(System.in);
        int num =input.nextInt();
        int i=0;
        for ( i=0;i<array.length;i++){

           
         if (array[i]==num){
             System.out.println("包含");
             break;
         }
        }
  if (i==array.length) {
      System.out.println("不包含");
  }

• 从键盘输入本次Java考试五位学生的成绩，求考试成绩最高分

 Scanner input = new Scanner(System.in);
      int[] array=new int[5];
   System.out.println("输入成绩");
for (int i=0;i<array.length;i++){
    System.out.println("请输入第"+(i+1)+"次成绩");
    array[i]=input.nextInt();
}
     int max=0;
        for (int i=0;i<array.length;i++){
            if (max < array[i]){
                max=array[i];
            }

            }
        System.out.println(max);

• 有一组学员的成绩{99，85，82，63， 60}，将它们按升序排列。要增加一个学员的成绩，将它插入成绩序列，并保持升序。

int []scores = {99,85,82,63,60};
        Arrays.sort(scores);
for (int i = 0;i<scores.length;i++){
    System.out.print(scores[i]+" ");
}

        Scanner input = new Scanner(System.in);
        System.out.println("输入下一个学生成绩");
        int in=input.nextInt();
        int pos = 0;
    for (int i =0; i<scores.length;i++) {
        if (in <= scores[i]) {
            pos = i;
            break;
        }
    }
        int[] scores2= new int[6];
        for (int i = 0;i<pos;i++){
            scores2[i]=scores[i];
        }
        scores2[pos]=in;
        for ( int i=pos+1;i<scores2.length;i++){
            scores2[i]=scores[i-1];
        }
        for (int i = 0;i<scores2.length;i++){
            System.out.println(scores2[i]+" ");
        }

将 一组乱序的字符进行排序
进行升序和逆序输出

String[] zi ={"a","c","u","b","e","p","f","z"};
        Arrays.sort(zi);

        for (int i =0;i<zi.length;i++){
            System.out.print(zi[i]);
        }

        System.out.println("倒序");
        for (int i = zi.length-1;i>=0;i--){
            System.out.print(zi[i]);
        }

• 在上一个练习的基础上改进：
  向上一个练习中得到的升序字符序列中插入一个新的字符，要求插入之后字符序列仍保持有序

        String[] zimu = {"a", "c", "u", "b", "e", "p", "f", "z"};
        for (int i = 0; i < zimu.length; i++) {
            System.out.print(zimu[i]+" ");
        }

        Arrays.sort(zimu);
       for (int i =0;i<zimu.length;i++){
           System.out.print(zimu[i]+" ");
       }


         String m = "m";

        int pos=6;

        String[] zimu2=new String[9];
        for (int i =0;i<pos;i++){
            zimu2[i]=zimu[i];
        }
        zimu2[pos]=m;

        for (int i =pos+1;i<zimu2.length;i++){
            zimu2[i]=zimu[i-1];
            System.out.println(zimu2[i]);
        }
        for (int i =0;i<zimu2.length;i++){
            System.out.print(zimu2[i]+" ");
        }