I'm new to C. I'm trying to get a lot of text from the user and count the number of words, characters, lines, whitespaces and letters. This is what I've done:
#include <ctype.h>
#include <stdio.h>
int main(void)
{
char c = getchar();
char previousc;
int charcount = 0;
int wordcount = 0;
int whitespacecount = 0;
int linecount = 0;
int lettercount = 0;
while(c != EOF)
{
if(isLetter(c) == 1) lettercount++;
if(isWhitespace(c) == 1)
{
whitespacecount++;
if(isWhitespace(previousc) == 0) wordcount++;
}
if(c == "\n") linecount++;
previousc = c;
c = getchar();
charcount++;
}
printf("Character Count: %d\n Word Count: %d\n Whitespace Count: %d\n Letter Count: %d\n Line Count: %d\n", charcount, wordcount, whitespacecount, linecount, lettercount);
}
int isLetter(char c) // 1 for true, 0 for false.
{
// instead of writing tons of if's
if(isalpha(c) > 0)
return 1;
return 0;
}
int isWhitespace(char c) // 1 for true, 0 for false.
{
if(c == "\n" || c == " " || c == " ") return 1;
return 0;
}
But I get so many errors and warnings I'm just lost…
program2.c: In function ‘main’:
program2.c:20: warning: comparison between pointer and integer
program2.c: At top level:
program2.c:28: error: conflicting types for ‘isLetter’
program2.c:28: note: an argument type that has a default promotion can’t match an empty parameter name list declaration
program2.c:14: error: previous implicit declaration of ‘isLetter’ was here
program2.c:35: error: conflicting types for ‘isWhitespace’
program2.c:35: note: an argument type that has a default promotion can’t match an empty parameter name list declaration
program2.c:15: error: previous implicit declaration of ‘isWhitespace’ was here
program2.c: In function ‘isWhitespace’:
program2.c:36: warning: comparison between pointer and integer
program2.c:36: warning: comparison between pointer and integer
program2.c:36: warning: comparison between pointer and integer
I googled the different errors but didn't find a solution that solves my problem.
Can you help me a bit?
Thanks.
Best Answer
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Define prototypes for your functions.
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