JAVA练习-创新互联

public class Test4 { // 编写一个程序，提示用户输入学生数量后，再依次输入姓名和成绩，按照成绩的降序来打印学生的姓 名 public static void main ( String [] args ) { System . out . println ( " 输入学生数量 " ); Scanner sc = new Scanner ( System . in ); int len = sc . nextInt (); String [] names = new String [ len ]; int [] scores = new int [ len ]; for ( int i = 0 ; i< names . length ; i ++ ) { names [ i ] = inputName ( sc ); scores [ i ] = inputScore ( sc ); } sort ( names , scores ); for ( int i = 0 ; i< names . length ; i ++ ) { System . out . println ( " 第 " + ( i + 1 ) + " 名学生： " + names [ i ] + ", 成绩 为 :" + scores [ i ]); } } public static String inputName ( Scanner sc ) { System . out . println ( " 姓名： " ); String tmp = "" ; while ( true ) { tmp = sc . next (); if ( tmp . length () >20 || tmp . length ()< 6 ) { System . out . println ( " 输入数据不合法，请重新输入 " ); } else break ; } return tmp ; } public static int inputScore ( Scanner sc ) { System . out . println ( " 成绩： " ); int tmp = 0 ; while ( true ) { tmp = sc . nextInt (); if ( tmp >100 || tmp< 0 ) { System . out . println ( " 输入数据不合法，请重新输入 " ); } else break ; } return tmp ; } public static void sort ( String [] names , int [] scores ) { for ( int i = 1 ; i< names . length ; i ++ ) { for ( int k = 0 ; k< names . length - i ; k ++ ) { if ( scores [ k ]< scores [ k + 1 ]) { int tmp = scores [ k ]; scores [ k ] = scores [ k + 1 ]; scores [ k + 1 ] = tmp ; String stmp = names [ k ]; names [ k ] = names [ k + 1 ]; names [ k + 1 ] = stmp ; } } } } }

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