#include <stdio.h>
#define LEN (100 * 1024)
unsigned char buf[LEN];
int main(int argc, char* argv[])
{
FILE* file;
unsigned long i;
if((file = fopen("10GB.dat", "wb")) == NULL)
return -1;
for(i = 0; i < 5 * 1024 * 1024; i++)
fwrite(buf, sizeof(unsigned char), LEN, file);
fclose(file);
return 0;
}
