"Expected an exit code of 0"

Question

I get the following error when I check50 helpers.c: \ expected an exit code of 0, not standard error of "helpers.c:24:17: error: implicit declar..."

Here is the source code of helpers.c:

bool search(int value, int values[], int n)
{
    // some things before it

    int index = binarySearch(value, values, 0, n);
    return index != -1; 
}

int binarySearch(int value, int values[], int min, int max)
{
    // some things
} 

More detailed error message from sandbox:

... but received the following on standard error instead —  helpers.c:24:17: error: implicit declaration of function 'binarySearch' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
int index = binarySearch(value, values, 0, n);
            ^
1 error generated.
make: *** [find] Error 1

Answer 1

As answered by Karreem:

When using check50, the default header is used and it of course doesn't contain our declarations. So we have to keep them in the source code file in order for our solution to work on the server.