control may reach end of non-void function [-Werror,-Wreturn-type] }

helpers.c

#include <cs50.h>
#include <string.h>
#include "helpers.h"
#include <stdio.h>

/**
 * Returns true if value is in array of n values, else false.
 */
bool search(int value, int values[], int n)
{
    // TODO: implement a searching algorithm
    if (n < 1) {
        return false;
    }
    sort(values, n);
}

/**
 * Sorts array of n values.
 */

void sort(int values[], int n) {
    if (n == 1) {
        
    }
    int left[n/2];
    int right[n/2];
    
    memcpy(left, values, sizeof left);
    memcpy(right, values + n/2, sizeof right);
    for (int i = 0, n = sizeof( right ) / sizeof( right[0]); i < n; i++) { //test
        printf("%d", right[i]);
    }
}

helpers.h

/**
 * helpers.h
 *
 * Helper functions for Problem Set 3.
 */
 
#include <cs50.h>

/**
 * Returns true if value is in array of n values, else false.
 */
bool search(int value, int values[], int n);

/**
 * Sorts array of n values.
 */
void sort(int values[], int n);