errors with basic function

This is a discussion on errors with basic function within the C Programming forums, part of the General Programming Boards category; Hi, I'm learning about basic functions and trying to debug my code but I'm pretty sure it matches my book ...

  1. #1
    Registered User cDev's Avatar
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    Jun 2006
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    errors with basic function

    Hi, I'm learning about basic functions and trying to debug my code but I'm pretty sure it matches my book exactly. I've looked it over a few times and it looks ok but I'm still getting errors...so if anyone could give it another look that would be a big help. I'm compiling this on a Mac. Here's the code:

    Code:
    #include <stdio.h>
    #define MAXLINE 1000	/* maximum input line length */
    
    int getline(char line[], int max);
    int strindex(char source(), char searchfor[]);
    
    char pattern[] = "ould";	/* pattern to search for */
    
    /* find all lines matching pattern */
    main()
    {
    	char line[MAXLINE];
    	int found = 0;
    	
    	while (getline(line, MAXLINE) > 0)
    		if (strindex(line, pattern) >= 0) 
    		{
    			printf("%s", line);
    			found++;
    		}
    	return found;
    }
    
    /* getline: get line into s, return length */
    int getline(char s[], int lim)
    {
    	int c, i;
    	
    	i = 0;
    	while (--lim > 0 && (c=getchar()) != EOF && c != '\n')
    		s[i++] = c;
    	if (c == '\n')
    		s[i++] = c;
    	s[i] = '\0';
    	return i;
    }
    
    /* strindex: return index of t in s, -1 if none */
    int strindex(char s[], char t[])
    {
    	int i, j, k;
    	
    	for (i = 0; s[i] != '\0'; i++) 
    	{
    		for (j=i, k=0; t[k]!='\0' && s[j]==t[k]; j++, k++)
    		;
    		if (k > 0 && t[k] == '\0')
    			return i;
    	}
    	return -1;
    }
    and the errors are:
    Code:
    strindex.c: In function 'main':
    strindex.c:16: warning: passing argument 1 of 'strindex' from incompatible pointer type
    strindex.c: At top level:
    strindex.c:40: error: conflicting types for 'strindex'
    strindex.c:5: error: previous declaration of 'strindex' was here
    Thanks for any help!

  2. #2
    Registered User
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    Code:
    int strindex(char source(), char searchfor[]);
    should be

    Code:
    int strindex(char source[], char searchfor[]);

  3. #3
    Registered User cDev's Avatar
    Join Date
    Jun 2006
    Posts
    26
    lol, thanks

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