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Top Forums Programming warning: comparison between pointer and integer Post 302565053 by agama on Sunday 16th of October 2011 03:03:47 PM
Old 10-16-2011
You've got double quotes when you need single quotes:


Code:
(input_message[output] == " ")

The " " is a pointer to a string (of a single blank) while input_message[output] is a single character (converted to int for comparison).


Also, the statement input_message != " " won't ever evaluate to true, as you're comparing two pointers and not what the pointers reference. Have a look at strcmp() and strncmp() functions which I think will do what you want in this situation.


There may be other issues; I didn't look all that closely.
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STRCMP(3)						   BSD Library Functions Manual 						 STRCMP(3)

NAME
strcmp, strncmp -- compare strings LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <string.h> int strcmp(const char *s1, const char *s2); int strncmp(const char *s1, const char *s2, size_t n); DESCRIPTION
The strcmp() and strncmp() functions lexicographically compare the null-terminated strings s1 and s2. The strncmp() function compares not more than n characters. Because strncmp() is designed for comparing strings rather than binary data, characters that appear after a '' character are not compared. RETURN VALUES
The strcmp() and strncmp() return an integer greater than, equal to, or less than 0, according as the string s1 is greater than, equal to, or less than the string s2. The comparison is done using unsigned characters, so that '200' is greater than ''. SEE ALSO
bcmp(3), memcmp(3), strcasecmp(3), strcoll(3), strxfrm(3) STANDARDS
The strcmp() and strncmp() functions conform to ISO/IEC 9899:1990 (``ISO C90''). BSD
October 11, 2001 BSD
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