5.26上课用java代码

package xu01;
import java.io.*;
public class caishu {
public static void main(String args[])throws IOException{
boolean again=false;
loop1: do {
int trueNum=(int)(Math.random()*9);
System.out.println("游戏开始了");
int i=3;
do {
System.out.println("请输入1-10之间的一个整数，（退出游戏请安");
int guessNum=System.in.read()-48;
System.in.skip(2);
if((guessNum==62)||(guessNum==30))
break loop1;
if(guessNum==trueNum) {
System.out.println("恭喜你中了");
break;

}
else {
if(guessNum>trueNum)
System.out.println("很遗憾偏大了"+guessNum);
else
System.out.println("很遗憾偏小了");
i--;
System.out.println("你还有"+i+"次机会");}
}while(i>0);
if(i==0) {
System.out.println("很遗憾你为猜中，正确数字为"+trueNum+"，游戏结束");
}
System.out.println("重新开始按y，结束请安");
char ch=(char)System.in.read();
System.in.skip(2);
if(ch=='Y')again=true;
else if(ch=='N')again=false;

}while(again);

}
}

 

新增：

package xu01;
import java.io.*;
public class caishu {
public static void main(String args[])throws IOException{
boolean again=false;
loop1: do {
int trueNum=(int)(Math.random()*100);
System.out.println("游戏开始了");
int i=3;
do {
System.out.println("请输入1-100之间的一个整数，（退出游戏请安");
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String str="";
int guessNum=0;
try {
str=br.readLine();
}catch(IOException e) {
e.printStackTrace();

}
if(str.equalsIgnoreCase("N"))
// int guessNum=System.in.read()-48;
// System.in.skip(2);
// if((guessNum==62)||(guessNum==30))
break loop1;
if(guessNum==trueNum) {
System.out.println("恭喜你中了");
break;

}
else {
if(guessNum>trueNum)
System.out.println("很遗憾偏大了"+guessNum);
else
System.out.println("很遗憾偏小了");
i--;
System.out.println("你还有"+i+"次机会");}
}while(i>0);
if(i==0) {
System.out.println("很遗憾你为猜中，正确数字为"+trueNum+"，游戏结束");
}
System.out.println("重新开始按y，结束请安");
char ch=(char)System.in.read();
System.in.skip(2);
if(ch=='Y')again=true;
else if(ch=='N')again=false;

}while(again);

}
}