Thread: binary array: won't print results out correctly

I meant to type in "binary search" not binary array whoops

hey, just wanted some help with this program. it's not my program, it was copied from a PowerPoint as notes for me to study off of, just putting the disclaimer here (it belongs to Pearson).

without further ado, here's the code:

Code:

#include <stdio.h>#define SIZE 15


size_t binarySearch(const int b[], int searchKey, size_t low, size_t high);
void printHeader(void);
void printRow(const int b[], size_t low, size_t mid, size_t high);


int main(void)
{
    int a[ SIZE ];
    size_t result;
    int key;
    size_t i;




    for (i = 0; i < SIZE; ++i)
    {
        a[ i ] = (2 * i);
    }


    printf("%s", "Enter a number between 0 and 28:\n");
    scanf("%d", &key);


    result = binarySearch(a, key, 0, SIZE - 1);


    if (result != -1)
    {
        printf("\n%d found in array element %d.\n", key, result);
    }
    else
    {
        printf("\n%d not found.\n", key);
    }
}


size_t binarySearch(const int b[], int searchKey, size_t low, size_t high)
{
    int middle;


    while (low <= high)
    {
        middle = (low + high) / 2;


        printRow(b, low, middle, high);


        if (searchKey == b[ middle ])
        {
            return middle;
        }
        else if (searchKey < b[ middle ])
        {
            high = middle - 1;
        }
        else
        {
            low = middle + 1;
        }
    }


    return -1;
}


void printHeader(void)
{
    unsigned int i;


    puts("\nSubscripts:\n");


    for (i = 0; i < SIZE; ++i)
    {
        printf("%3u", i);
    }


    puts("");


    for (i = 1; i <= 4 * SIZE; ++i)
    {
        printf("\n%s\n", "-");
    }


    puts("");
}


void printRow(const int b[], size_t low, size_t mid, size_t high)
{
    size_t i;


    for (i = 0; i < SIZE; ++i)
    {
        if (i < low || i > high)
        {
        printf("%s", "    ");
        }
        else if (i == mid)
        {
        printf("%3d", b[ i ]);
        }
        else
        {
        printf("%3d", b[ i ]);
        }
    }




    puts("");
}

What it should print (when you input 8, for example):
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
---------------------------------------
0 2 4 6 8 10 12 14 16 18 20 22 24
0 2 4 6* 8 10 12
8 10* 12
8*

8 found in array element 4.
(pretend that the numbers are aligned, the forum won't accept empty spaces)

Unfortunately, the hyphens and the 0-14 digits don't show up. The asterisks don't, either. According to the PowerPoint, it should work, yet it doesn't. Is it an issue with the compiler I have or the code itself? Thanks in advance!!!