I have created a program to read from an external file. The program must locate the first maximum and the second. I am unsure about how to find the second maximum. Possibly by resetting the first max, but I am unsure how to do it. Here is my code for the program to locate the first max. What should i do from here?
I am a big time beginner. Thanks!

Code:
/* Homework 14 */

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#define FILENAME "exam2.dat"

int main(void)
{

        /* Declare and initalize variables. */
        int j=0, locmax, flag0=0, x, max, count=0;
        double sum=0.0, ave;
        FILE*data;

        /* Open file. */
        data=fopen(FILENAME, "r");

        /*Read file. */
        while (fscanf(data, "%i", &x) == 1)

        {
        j++;
        sum+=x;
        count++;
                if(flag0==0)
                {
                        flag0=1;
                        max=x;
                        locmax=j;
                }
        if(x>max)
                {
                max=x;
                locmax=j;
                }
        }
/* Compute average. */
        {
                ave=sum/count;

                /* Print summary. */
                printf("Average: %7.2f \n", ave);
                printf("Maximum: %3i \n", max);
                printf("Location of Max: %3i \n", locmax);
        }
        fclose(data);
        return 0;
}