#include <stdio.h>

#define MINUS_NINE_NINE_NINE -999
int main(void)
{
    int num = 0;
    int firstMax = MINUS_NINE_NINE_NINE;
    int secondMax = MINUS_NINE_NINE_NINE;
    int oldFirstMax = MINUS_NINE_NINE_NINE;
    //declaring vars
    while(num!=MINUS_NINE_NINE_NINE)
    {
        printf("Enter number(-999 to end): ");
        scanf("%d",&num);
        getchar();
        //getting a number from the user
        if (num > firstMax)
        {
            oldFirstMax = firstMax;
            firstMax = num;
            secondMax = oldFirstMax;
        }
        /*
        if number is bigger than the first max ,
        old first max will be equal to the old number ,
        new first max will be equal to the current number ,
        second max will be equal to the old first max.
        */
        else if(num > secondMax)
        {
            secondMax = num;
        }
        /*
        if number isn't bigger than first max but is bigger than second max,
        second max will be equal to the current number.
        */
    }
    printf("First max: %d, Second max: %d",firstMax,secondMax);
    //printing the first max and the second max
    return 0;
}