else if 语句在我放入 while 循环时不起作用

Question

I have a problem, when I use if statement in while loop, it works with if, but it doesn't in else if

I need from program to print the largest number and the second largest number

here is the code

int num = S.nextInt();
int max = num;
int max2 = num;
while (num != -1) {
    if (num > max)
        max = num;

    else if (max2 <= num && max > num)
        max2 = num;

num = S.nextInt();
}
System.out.println("The max = " + max);
System.out.print("The max 2 = " + max2 );

Answer 1

it's not the problem why not go into else if.it's logic problem.
I can show you example

int num = S.nextInt();
int max = num;
int max2 = 0;
while (num != -1) {
    if (num > max){
        max2 = max;
        max = num;
    }else if (num > max2){
        max2 = num;
    }

    num = S.nextInt();
}
System.out.println("The max = " + max);
System.out.print("The max 2 = " + max2 );

the solution is

• if max find bigger number.then give original max number to max2.and the new number to max
• in case the first num is the biggest.so we set max2 to 0.and if there is no bigger number than max,we do compare on max2