program compiles, runs, but produces no output
Well, here it is. I am having problems only within the for loop at the bottom(in red). I think there could be an error in logic.
Code:
#define _CRT_SECURE_NO_WARNINGS // To turn off VC++ 2008 deprecation warnings
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define NUMBEROFFILES 1500 // maximum number of files in the directory listing
#define LINELENGTH 150 // length of a line in the directory listing
#define FILENAMELENGTH 40 // length of an .html file
#define BEGINNINGOFHTMLLIST 5 // first html file in directory list
#define FILELINELENGTH 1000 // lengh of a line in an html file
int main( void )
{
int lastfilenumber1, lastfilenumber2;
FILE *p_openfile;
char *p_comma; // used to test for occurence of a comma in a line of the directory listing
char *p_line; // stores successive lines from a file from the directory listing
int counter1, counter2;
char *p_searchstring; // used for strstr()
char *p_searchtext = "every"; // string to search for in a file
struct data {
int month, day, year, hour, minute;
char string1[2+1];
int number1, number2;
char string2[FILENAMELENGTH];
char stringstorage[LINELENGTH]; // Used to store strings from file
char string3[FILENAMELENGTH]; // filenames that contain the search string
} LineData[NUMBEROFFILES];
// Get a list of files in the directory "testwebsite", and redirect the
// output to a file called "directorylisting.txt". */
system("dir c:\\testwebsite\\*.html > directorylisting.txt");
// Test to see that the file "directorylisting.txt" can be opened for reading.
if( (p_openfile = fopen("directorylisting.txt", "rt")) == NULL)
{
perror("directorylisting.txt");
exit( EXIT_FAILURE );
}
// Copy the lines in the file to the array
counter1 = 0;
while((fgets(LineData[counter1].stringstorage, LINELENGTH, p_openfile) != NULL) && (counter1 < NUMBEROFFILES))
{
lastfilenumber1 = counter1;
counter1++;
}
fclose(p_openfile);
// Process the string, and store data items in the structure members
for( counter1 = BEGINNINGOFHTMLLIST; counter1 < lastfilenumber1; counter1++)
{
if( (p_comma = strchr( LineData[counter1].stringstorage, ',')) != NULL )
{
sscanf(LineData[counter1].stringstorage, "%d%/%d/%d %d:%d %s %d,%d %s", &LineData[counter1].month,
&LineData[counter1].day,&LineData[counter1].year, &LineData[counter1].hour,
&LineData[counter1].minute, LineData[counter1].string1, &LineData[counter1].number1,
&LineData[counter1].number2,&LineData[counter1].string2);
}
if( (p_comma = strchr( LineData[counter1].stringstorage, ',')) == NULL )
{
sscanf(LineData[counter1].stringstorage, "%d%/%d/%d %d:%d %s %d %s", &LineData[counter1].month,
&LineData[counter1].day, &LineData[counter1].year, &LineData[counter1].hour,
&LineData[counter1].minute, LineData[counter1].string1, &LineData[counter1].number1,
&LineData[counter1].string2);
}
}
// open up a file, search for p_searchtext, if it exists, store filename(LineData[counter1].string2) in
// LineData[counter2].string3 then print LineData[counter2].string3. open up next file etc.
counter2 = 0;
for( counter1 = BEGINNINGOFHTMLLIST; counter1 < (lastfilenumber1 - 1); counter1++)
{
if((p_openfile = fopen(LineData[counter1].string2, "rt")) == NULL)
{
printf("\nError opening file %s", LineData[counter1].string2);
exit(EXIT_FAILURE);
}
p_line = malloc(FILELINELENGTH * sizeof(char));
while((fgets(p_line, FILELINELENGTH, p_openfile) != NULL) &&
(p_searchstring = strstr(p_line, p_searchtext) != NULL))
{
strcpy(LineData[counter2].string3, LineData[counter1].string2);
printf("\n%s", LineData[counter2].string3);
lastfilenumber2 = counter1;
counter2++;
free(p_line);
p_line = malloc(FILELINELENGTH * sizeof(char));
}
fclose(p_openfile);
}
return 0;
}
Here is what I want to achieve with the for loop:
1. open an .html file for reading.
2. allocate memory to a pointer to a string(p_line)
3. use fgets() to read the first string(line) of the file into p_line
4. search p_line for the occurence of 'every'
5. if p_line(and therefore the file) contains the word 'every', copy that filename to LineData[counter2].string3, then printf LineData[counter2].string3
6. free memory to p_line
7. allocate memory to p_line again
8. go to step 3 to read the next line in the file
9. go to 4.
10. go to 5...and so on.
11. keep reading files until the EOF
12. go to 1 again to open up the next file and repeat until all files have been opened and searched.
What I am really trying to achieve is to print the names of all the files that contain the word 'every'.
However, nothing gets printed at all.
Where did I go wrong?
Thanks in advance. :)
