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uber0ne
Joined: 14 Jun 2006
Posts: 4
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 Posted: Wed Jun 14, 2006 4:28 pm Post subject: Reading file line by line |
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Ok here what i want to do. I have a file named myfile.txt i want to pick a random number and have it read that line of the file.
EX.
hhhhh
jjjjjjjj
kkkkk
lllllllllll
yyyyy
tttttttt
and i want to pull out line 4 and store it in a variable so that
variable == lllllllllll
If this would be easier with an ini then please tell me. |
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groepaz
Joined: 01 Sep 2005
Posts: 305
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uber0ne
Joined: 14 Jun 2006
Posts: 4
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| Posted: Wed Jun 14, 2006 4:59 pm Post subject: |
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| i want to be able to tell the program line number 4 and it goes to line number 4 and pulls out the file or and number |
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groepaz
Joined: 01 Sep 2005
Posts: 305
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uber0ne
Joined: 14 Jun 2006
Posts: 4
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| Posted: Wed Jun 14, 2006 5:21 pm Post subject: |
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| yea but how would i do that.... |
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Drakonite
Site Admin
Joined: 17 Jan 2004
Posts: 989
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| Posted: Wed Jun 14, 2006 7:38 pm Post subject: |
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Learning C would be a good start.
_________________
Shoot Pixels Not People!
Makeshift Development |
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sg57
Joined: 14 Oct 2005
Posts: 154
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| Posted: Thu Jun 15, 2006 12:04 pm Post subject: |
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Just as i had said and psoted on psp-programming.com...
| Code: |
#include <stdio.h>
// what line to go to: 5 as example
#define GotoLine 5
// do not touch below
#define lineNumber 0
int main() {
char string[1000];
int z;
FILE * pFile;
long lSize;
char * buffer;
pFile = fopen ( "myfile.txt" , "rb");
printf("File Opened Successuflly\n");
fseek (pFile , 0 , SEEK_END);
lSize = ftell (pFile);
rewind (pFile);
buffer = (char*) malloc (lSize);
for ( z=lineNumber; z<GotoLine; z++ ) {
fgets(buffer, lSize, pFile);
}
printf("%s", buffer);
getch();
return 0;
} |
Complied and tested WORKING via Dev-C++, if you wish to use this on the PSP, change getch(); to the sceKIernelSleepThread(); or delay, or whatever... Also, as you cna tell, the line number being read is fed into the buffer named 'buffer' so...
oh and to get a random line number from the file, then do this, since at psp-rpogramming you asked for random, AKA doing your ENTIRE code for you :(
| Code: | #include <stdio.h>
#define GotoLine rand()%100
int main() {
char string[1000];
int lineNumber = 0, z;
FILE * pFile;
long lSize;
char * buffer;
srand(time());
pFile = fopen ( "myfile.txt" , "rb");
printf("File Opened Successuflly\n");
fseek (pFile , 0 , SEEK_END);
lSize = ftell (pFile);
rewind (pFile);
buffer = (char*) malloc (lSize);
for ( z=lineNumber; z<GotoLine; z++ ) {
fgets(buffer, lSize, pFile);
}
printf("%s", buffer);
getch();
return 0;
} |
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boomint
Joined: 13 Apr 2004
Posts: 80
Location: Sheffield, UK
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| Posted: Thu Jun 15, 2006 5:04 pm Post subject: |
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You may also want inform him that GotoLine definition assumes there are 100 lines in the file...
| sg57 wrote: | | Code: |
#define GotoLine rand()%100
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And leave populating this with the actual number of lines in the file as an exercise for the reader ;)
_________________
--( someone stole my sig! )-- |
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sg57
Joined: 14 Oct 2005
Posts: 154
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| Posted: Fri Jun 16, 2006 12:21 am Post subject: |
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well at psp-programming.com he had asked for something that will read a file line by line, when having like 5 lines in it, so i just assumed 100 for guessing. And theres a way to first get the number of lines in a file then have it done automaticaly... Use a loop,
while ( gets(file) 1= '\0') { puts(file); LineCount++; } |
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