fwrite 질문있습니다.

$ cat fwrite.c
#include <stdio.h>
 
int main( )
{
    FILE *pFile = fopen( "test.txt", "w+t" );
    char buffer[] = "Hello, World!\n";
 
    for (int i=0; i<300; i++)
        fwrite( buffer, sizeof(char), sizeof(buffer), pFile );
 
    int i;
    scanf("%d", &i);
 
    fclose( pFile );
 
    return 0;
}
 
$ gcc -o frwite fwrite
$ ./fwrite &
[1] 162148
$
 
[1]+  Stopped                 ./fwrite
$ ls -l test.txt
-rw-rw-r--  1 tester tester  4096 Jun  4 20:08 test.txt
$ fg
./fwrite
1
$ ls -l test.txt
-rw-rw-r--  1 tester tester  4500 Jun  4 20:09 test.txt