Run time error in C - c

Question

My code gives a run time error when I reach the middle of the file.
If I change the values of temp2 or temp1 then it crashes at the start of the file.
I can't understand the error I am making in this file.
It runs smoothly on a small file which has 100 lines.
I am making a file searching project so I need to store big files which have directories of entire drives.
#include<stdio.h>
#include<string.h>
#include<windows.h>
#include<conio.h>
char file[99999];
void brek(char *p, char *q);
void main()
{
FILE *fp;
int x = 0, y = 0;
int a = 0, b = 0;
int g = 0;
char temp1[10000]; // temp1 is simply for jumping to the date against the given directory or file
// the main array storing the lines is temp2.
char temp2[1000][1000];
system("chdir C:\\Users\\Faraz\\Documents && dir /s > dir.txt");
fp = fopen("C:\\Users\\Faraz\\Documents\\dir.txt", "r");
while ((y = getc(fp)) != EOF)
{
file[x] = y;
x++;
}
fclose(fp);
file[x] = '\0';
puts(&file[0]);
// <----the copying of the file to the string "file (globally declared)"is
// done---->//
getche();
system("cls");
// <-------------------start loop-------------------->//
a = 0;
while (file[a] != '\0') // <-------starting of the loop
{
while (file[a] != '/')
{
temp1[a] = file[a];
a++;
}
temp1[a] = '\0';
a = a - 2;
b = 0;
while (file[a] != '\n')
{
temp2[g][b] = file[a];
b++;
a++;
}
temp2[g][b] = '\0';
puts(&temp2[g][0]);
g++;
}
// <-----------------end loop---------------------->//
}

Answer 1

Try this instead
int
main(int argc, char **argv)
{
LPWIN32_FIND_DATAA fdFile;
HANDLE hFind = NULL;
const char *sPath = "C:\\Users\\Faraz\\Documents\\*.*";
if((hFind = FindFirstFile(sPath, &fdFile)) == INVALID_HANDLE_VALUE)
{
printf("no such directory %s\n", sPath);
return -1;
}
do
{
printf("Directory: %s\n", fdFile->cFileName);
}
while(FindNextFile(hFind, &fdFile)); //Find the next file.
FindClose(hFind); //Always, Always, clean things up!
return 0;
}

Answer 2

THe answer i found out is that you simply cant load a 1gb file in a 512 mb memory.
So we define buffer size at the top of the string using
#define BUFFER_SIZE 512
and using fgets we read the file line - by - line hence not overloading our memory space allocated by OS.
Dynamic Memory Allocation is not the solution to our problem as we start using heap space.