//問題：兩個for省略第一個表達(dá)式之后運行結(jié)果很奇怪，請問我這樣寫的話循環(huán)變量的初始化變成什么了？package homework;//求0-100的質(zhì)數(shù)個數(shù)public class IsZhiShu { public static void main(String[] args) { // TODO Auto-generated method stub int zishu = 0; int sushu = 0; int i =2; int j=2; //遍歷2-100的數(shù) for(;i<=100;i++) ? ? ? ? ? //???????????? { //判斷是否能被整除 for(;j<i;j++) ? ? ? ? ? //??????????? { if(i%j==0) { System.out.println(i+"是質(zhì)數(shù)"); zishu ++; break; } } if(j==i) { System.out.println(i+"是素數(shù)"); sushu++; } } System.out.println("質(zhì)數(shù)有"+zishu+"個"); System.out.println("素數(shù)有"+sushu+"個"); }}