请检查输出是否包含：它是个3位的数！
int num = 999;
int count = 0;
do
{
count++;
num = num/10;
}
while (num>0);
System.ou.println("它是个"+ count + "位的数！");
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int num = 999;
int count = 0;
do
{
count++;
num = num/10;
}
while (num>0);
System.ou.println("它是个"+ count + "位的数！");
2017-08-20
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