char *test = "This is a test";

//*****************************************************************************
// This routine searches the string "ptr" for the character "val".
// It returns the address of the first occurance of "val" if found.
// Otherwise, it will return the address of the NULL at the end of the string.
//*****************************************************************************
char *FindChar(char *ptr, int val)
{
    while (*ptr)
    {
        if (*ptr == val) break;
        ptr++;
    }
    return ptr;
}

//*****************************************************************************
// This routine searches a string for the letter "A".  If "mode" is zero, the
// string pointed to by "str" will be searched.  Otherwise, the global variable
// "test" will be searched.  This routine uses FindChar to do the search.
//*****************************************************************************
char *FindA1(char *str, int mode)
{
    char *ptr;

    if (mode == 0) ptr = FindChar(str, 'a');
    else ptr = FindChar(test, 'a');

    return ptr;
}

//*****************************************************************************
// This routine searches a string for the letter "A".  If "mode" is zero, the
// string pointed to by "str" will be searched.  Otherwise, the global variable
// "test" will be searched.  This routine does not use FindChar to  do the
// search.
//*****************************************************************************
char *FindA2(char *str, int mode)
{
    int i = 0;
    char *ptr;
    int val = 'a';

    if (mode == 0)
    {
        while (str[i])
        {
            if (str[i] == val) break;
            i++;
        }
        ptr = &str[i];
    }
    else
    {
        while (test[i])
        {
            if (test[i] == val) break;
            i++;
        }
        ptr = &test[i];
    }

    return ptr;
}
 