Program stops loop when if statement is met

I cant get my if statement to actually print anything even when it should be true.

When I remove the if statement the program runs through the while loop until the end of the text file, however it will stop once the if statement condition is met. (I have the problematic if statement commented out for the sake of posting this)

#include <stdio.h>
int *file_int, *file_int2, *inv1,*inv2, *inv3, *inv4, *num;
int counter = 0;

int main(){
    FILE * in_file;
    in_file = fopen("beerinput.txt", "r");
    while (!feof(in_file)){
        counter +=1;
        printf("LOOP #%d\n", counter);
        fscanf(in_file, "%d\n", &file_int);
        printf("file_int = %d\n", file_int);

        fscanf(in_file, "%d\n", &file_int2);
        printf("file_int2 = %d\n", file_int2);
      /*if (file_int == 1){
            inv1 += *file_int2;
            printf("%d", inv1);
        }*/
}
}

Output when if statement is commented out: LOOP #1 file_int = 100 file_int2 = 300 LOOP #2 file_int = 500 file_int2 = 900 LOOP #3 file_int = 1 file_int2 = 200 LOOP #4 file_int = 2 file_int2 = 200 LOOP #5 file_int = 3 file_int2 = -100 LOOP #6 file_int = 4 file_int2 = 200 LOOP #7 file_int = 4 file_int2 = -200 LOOP #8 file_int = 3 file_int2 = -100 LOOP #9 file_int = 2 file_int2 = -300 LOOP #10 file_int = 1 file_int2 = -99 LOOP #11 file_int = -1 file_int2 = -99

VS. Output when the if statement isnt commented out: LOOP #1 file_int = 100 file_int2 = 300 LOOP #2 file_int = 500 file_int2 = 900 LOOP #3 file_int = 1 file_int2 = 200