while问题
int num = 999;
int count = 0;
while(num>0&&num<9999999999)
{
count++;
num=num/10;
}
System.out.println("它是个"+count+"位的数!");
,哪错了啊
int num = 999;
int count = 0;
while(num>0&&num<9999999999)
{
count++;
num=num/10;
}
System.out.println("它是个"+count+"位的数!");
,哪错了啊
2015-10-18
参考代码
public class HelloWorld{ public static void main(String[] args){ int num = 999; int count = 0; if (num >= 0 && num<=999999999){ while(num != 0){ count++; num/=10; } System.out.println("它是个"+ count+"位的数!"); } else{ System.out.println("输入有误!"); } } }
第一步应该是判断num是不是在0~99999999区间。然后在进入while循环。不要把if和while搞混了。
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