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luobin7
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JavaSECode
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chapter03
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WhileTest1.java
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main
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-java-
/
JavaSECode
/
chapter03
/
src
/
WhileTest1.java
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/*
随机生成一个100以内的数,猜这个随机数是多少?
从键盘输入数,如果大了,提示大了;如果小了,提示小了;如果对了,就不再猜了,并统计一共猜了多少次。
提示:生成一个[a,b] 范围的随机数的方式:(int)(Math.random() * (b - a + 1) + a)
*/
import
java
.
util
.
Scanner
;
class
WhileTest1
{
public
static
void
main
(
String
[]
args
) {
//1. 生成一个[1,100]范围的随机整数
int
random
= (
int
)(
Math
.
random
() *
100
) +
1
;
//2. 使用Scanner,从键盘获取数据
Scanner
scan
=
new
Scanner
(
System
.
in
);
System
.
out
.
print
(
"请输入1-100范围的一个整数:"
);
int
guess
=
scan
.
nextInt
();
//3.声明一个变量,记录猜的次数
int
guessCount
=
1
;
//4. 使用循环结构,进行多次循环的对比和获取数据
while
(
random
!=
guess
){
if
(
guess
>
random
){
System
.
out
.
println
(
"你输入的数据大了"
);
}
else
if
(
guess
<
random
){
System
.
out
.
println
(
"你输入的数据小了"
);
}
//else{
// break;
//}
System
.
out
.
print
(
"请输入1-100范围的一个整数:"
);
guess
=
scan
.
nextInt
();
guessCount
++;
}
//能结束结束,就意味着random和guess相等了
System
.
out
.
println
(
"恭喜你!猜对了!"
);
System
.
out
.
println
(
"共猜了"
+
guessCount
+
"次"
);
scan
.
close
();
}
}
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