/*
 * Copyright (c) 2020, Dive into Systems, LLC (https://diveintosystems.org/)
 * Program with some bugs in the findAndReturnMax function
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/***************************************
 * this function should find the largest element in the array and
 * "return" it through max
 * 	array: array of integer values
 * 	len: size of the array
 * 	max: set to the largest value in the array
 *      returns: 0 on success and non-zero on an error
 */
int findAndReturnMax(int *array1, int len, int max) {

    int i;

    if (!array1 || (len <=0) ) {
        return -1;
    }
    max = array1[0];
    for (i=1; i <= len; i++) {
        if (max < array1[i]) {
            max = array1[i];
        }
    }
    return 0;
}

/***************************************/
int main(int argc, char *argv[]) {

    int arr[5] = { 17, 21, 44, 2, 60 };

    int max = arr[0];

    if ( findAndReturnMax(arr, 5, max) != 0 ) {
        printf("strange error\n");
        exit(1);
    }
    printf("max value in the array is %d\n", max);

    return 0;
}