這樣為何不行
public class HelloWorld{
?public static void main(String[] args){
??int num = 999;
??int count = 0;
??for(int i=1;i<=1000000000;i=i*10){
??while(num/i!=0)
??count++;
??if(num/i==0)
??break;
??}
??System.out.println("它是個"+count+"位的數(shù)");
??}
}
2016-10-18
int 范圍數(shù)據(jù)溢出
2016-10-14
if (num >= 0 ?&& num<=999999999){
while(num != 0){
count++;
num/=10;
}
System.out.println("它是個"+ count+"位的數(shù)！");
} else{
System.out.println("輸入有誤！");
}