I'm really new to C(I have been learning Cuda and wanted to learn C so I can run everything together instead of generating data in Java/Python and copy/pasting it manually to my Cuda program to play with). I am trying to open a large file(20+gb) and parse some data but because I was having problems I decided to try to break down my problem first to verify I can open and read line by line a file and then in another file take a sample of the output of a line and try to parse it, then if all goes well I can simply bring them together. I managed(after a bit of a struggle) to get each part working but when I combine them together it doesn't work(I tried in both eclipse & QT creator. QT creator says it exited unexpectedly and eclipse just stops..).
Here's the parsing part(it works exactly as I want):
#include <string.h>
#include <stdio.h>
int main()
{
char line[1024] = "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 4],";
size_t len = strlen(line);
memmove(line, line+1, len-3);
line[len-3] = 0;
printf("%s \n",line);
char str[100], *s = str, *t = NULL;
strcpy(str, line);
while ((t = strtok(s, " ,")) != NULL) {
s = NULL;
printf(":%s:\n", t);
}
return 0;
}
The data in variable line is exactly as I get if I print each line of a file. But when I copy/paste it into my main program then it doesn't work(QT shows nothing and eclipse just shows the first line). This code is just a few file IO commands that are wrapped around the commands above(everything within the while loop is the exact same as above)
#include <stdio.h>
#include <stdlib.h>
int main() {
char line[1024];
FILE *fp = fopen("/Users/me/Desktop/output.txt","r");
printf("Starting.. \n");
int count = 0;
int list[30]; //items will be stored here
while(fgets(line, 1024, fp) != NULL){
count++;
//char line[1024] = "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 4],";
size_t len = strlen(line);
memmove(line, line+1, len-3);
line[len-3] = 0;
printf("%s \n",line);
char str[100], *s = str, *t = NULL;
strcpy(str, line);
while ((t = strtok(s, " ,")) != NULL) {
s = NULL;
printf(":%s:\n", t);
}
}
printf(" num of lines is %i \n", count);
return 0;
}
eclipse output:
Starting..
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 4
I can't figure out what I'm doing wrong. I'm using a mac with gcc 4.2, if that helps. The only thing I can think of is maybe I'm doing something wrong the way I parse the list variable so its not accessible later on(I'm not sure its a wild guess). Is there anything I'm missing?
