嵌套do....while
public?class?s004?{
???public?static?void?main(String[]?atgs){
???int?a=1;
???int?sum=0;//50內(nèi)偶數(shù)的和
???do{
?????do{
?a=++a;
}while(a%2!=0);//此段為排除奇數(shù)，輸出偶數(shù)
sum=sum+a;
a=++a;
????}while(a<=50);//此段為限定偶數(shù)范圍
???System.out.println(sum);
???} ???
}
2015-12-16
int sum=0;
for(int a=1;a<=50&&a%2==0;a++){
sum=sum+a;
}
System.out.println(sum);