耿祥义张跃平大学实用教程编程题答案

路漫漫其修远兮，吾将上下而求索 - 百度文库

习题解答

第一章 作业题

1．

public class Hello{

public static void main (String args[ ]){

System.out.pintln(“早上好，good Morning”); } } 2．

import java.applet.*; import java.awt.*;

public class Boy extends Applet { public void paint(Graphics g) { g.setColor(Color.blue);

g.drawString(\你好,hello\ } }

第二章 作业题

1．

public class ZuoYe2_1{

public static void main (String args[ ]){ char c='а';

System.out.println(\字母\在unicode表中的顺序位置:\ System.out.println(\字母表：\ while(c<='я'){

System.out.print(\ c=(char)(c+1); } 1

路漫漫其修远兮，吾将上下而求索 - 百度文库

}

}

2．

import java.util.*;

public class ZuoYe2_2{

public static void main (String args[ ]){

Scanner reader=new Scanner(System.in); long chengji=1; int m=0;

while(reader.hasNextInt()){ int x=reader.nextInt(); m=m+1;

chengji=chengji*x; }

System.out.println(m+\个数的乘积为\ } }

第三章 作业题

1．

import java.util.*;

public class ZuoYe3_1{

public static void main (String args[ ]){

Scanner reader=new Scanner(System.in); double y=0,x=0;

x=reader.nextDouble(); if(x<0)

y=-1+2*x; else if(x==0) y=-1; else if(x>0) y=-1+3*x;

System.out.println(y); } } 2．

public class ZuoYe3_2{ 2

路漫漫其修远兮，吾将上下而求索 - 百度文库

public static void main(String args[]){ int sum=0,m=3,n=7,a=1; while(a<=1000){

if(a%m==0&&a%n==0) sum=sum+a; a++; }

System.out.println(\ } } 3．

public class ZuoYe3_3 {

public static void main(String args[]) {

long sum=0,a=8,item=a,n=10,i=1;

for(i=1;i<=n;i++)

{ sum=sum+item;

item=item*10+a; }

System.out.println(sum); } } 4．

public class ZuoYe3_4 {

public static void main(String args[]) {

double sum=0,a=1,b=1,fuhao=1,item=a/b; int i=1;

while(i<=1000) {

sum=sum+fuhao*item; i++;

fuhao=fuhao*(-1); b=b+2; item=a/b; }

System.out.println(\ } 3