Thread: Help with .txt search.

Hey everyone!

I'm working on a program that reads in a .txt file and searches through the text for a keyword. If it gets a hit on the keyword, the line number where the keyword is located and the line that contains the keyword is printed out. What I have now doesn't catch every occurance of the keyword "a". Any ideas why?

Code:

#include <stdio.h>
#include <string.h>

int main(int argc, char **argv)
{
    char line[1024];
    char copy[1024];
    char * pch;
    int line_count = 0;
    char test[2] = "a"; 
    FILE* file;
    file = fopen(argv[1], "r");
    
    if(file != NULL)
    {
        while( fgets(line, sizeof line,file) != NULL)
        {
            strcpy(copy,line);
            line_count++;
            pch = strtok (line, " ");
            while(pch != NULL)
            {
                if( strcmp(pch, test) == 0)
                {
                    
                    printf("\n%d:%s\n", line_count, copy);
                }
                pch=strtok(NULL, " ");
            }
        }
    }
    else{printf("\n\n\tError\n");}
    
    return 0;
    
    
}//end main

Here is the text file I have been using to test the code. (It's an quote for the Godfather!)

Code:

I raised my daughter in the American
fashion; I gave her freedom, but
taught her never to dishonor her
family.  She found a boy friend,
not an Italian.  She went to the
movies with him, stayed out late.
Two months ago he took her for a
drive, with another boy friend.
They made her drink whiskey and
then they tried to take advantage
of her.  She resisted; she kept her
honor.  So they beat her like an
animal.  When I went to the hospital
her nose was broken, her jaw was
shattered and held together by
wire, and she could not even weep
because of the pain.

Thanks!

More experienced people correct me if I'm wrong, but it sounds like you want to find any occurrence of the letter 'a' regardless of if it's alone or in a word, but what you're doing is breaking each line of the file up into, more or less, words. And those entire words are being string-compared against the string "a". This means that you will only find lines that have the letter "a" all by itself on it.

Actually that's what I'm trying to do! Find only the occurances of "a" all by itself. But when run with the text file I have above it only finds the "a" on line 4 "famlily, she found a boy friend" and doesn't find the "a" on line 7 "Two months ago he took her for a". I can't think of any reason why it would not find all occurances of "a" all by itself.

That was it! Thank you all for your help. Happy coding!