Problem 2. Write a program that reads a list of integers from the f...

#include <stdio.h>
#include <stdlib.h>

#define MAX_LIST 2500
#define MAX_KEYS 20

// can be used for debuging

void print(int arr[], int sz){
    for(int i = 0; i < sz; i++){
       printf("%d ", arr[i]);
    }
    printf("\n");
}


void read_int_arr(char *filename, int arr[], int *n){
    FILE *fp;
    fp = fopen(filename, "r");
    if(!fp){
       printf("Could not open file %s\n", filename);
       exit(1);
    }
    *n = 0;
    while(fscanf(fp, "%d", &arr[*n]) == 1){
       (*n)++;
    }
    fclose(fp);
}

int position(int * list, int size, int key){
    int i;
    // iterate from the first item to the last item
    for (i = 0; i < size; i++) {
       if (list[i] == key) { // this item meets key value
            // return its index
            return i;
       }