} A.1 B.2 C.0
D.编译报错
39.下面程序运行的结果是()
public static void main(String [] args) {
int x = 12345; switch(++x) {
case 12345;
System.out.println(“A”); break; case 12346;
System.out.println(“B”); break; default;
System.out.println(“C”); break;
} } A.A B.B C.BC
D.程序报错
40.求1到10之间所有的偶数和,下面可以填入?处代码和?处代码的是() int sum = 0;
for(int x = 0; x <= 10; ?) {
? }
System.out.println(sum); A. x++;
if(x % 2 != 0) {
sum +=x; } B. x+= 2; sum += x; C. ++x;
if(x % 2 ==0) {
sum += x; } D. x += 1;
sum = 1 + 2 + 4+ 6 +８+ 10;
