檢查輸出包含：它是個(gè)3位的數(shù)!
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("它是個(gè)"+count+"位的數(shù)!");
}else{
? ? System.out.println("輸入有誤!");
}
}
}
2017-09-21
!!!
2017-08-29
if (num>=0 && num<999999999){
do{
???? ? ?count++;
? ? ? ? num/=10;
}while( num>1){
? ? ? ??System.out.println("它是個(gè)"+count+"位的數(shù)！");
}else{
? ?System.out.println("錯(cuò)誤");
}
}
2017-08-29
public?class?HelloWorld { ????/** ?????*該方法支持無(wú)線位數(shù)的數(shù)字判斷 ?????*/ ????public?static?void?main(String[]?args) ????{ ????????int?num?=?999; ????????int?count?=?0; ????????int?maxNum?=?1;//用于循環(huán)判斷num?為幾位數(shù)的臨界數(shù)值?10?100?1000?..... ????????while(num?>?maxNum) ????????{ ????????????maxNum?*?=?10; ????????????count?++; ????????} ????????System.out.println("它是個(gè)"+count+"位的數(shù)!"); ????} }