fwrite有问题，fgets处理它

Question

 char string[50], s[50];
 File *f = tmpfile();
 count = 1;

 while (fgets(string, 50, stdin)) {
    if (string[0] == '!') {
        rewind(f);
    } else {
        fwrite(string, 50, 1, f);
    }

    if (strcmp("history\n", string) == 0) {
        rewind(f);
        while(fgets(s, 50, f)) {
            printf("\t%d  %s", count, s);
            count++;
        }
        count = 1;
    }
 }

The context of this code is not hugely important. The problem is that let's say fgets takes in "ls", "date", and "history". The resulting output is:

1  ls
2   3  te
4   5  ory
6 

It should be:

1  ls
2  date
3  history

Answer 1

Since feature requests to mark a comment as an answer remain declined, I copy the above solution here.

Looks like you get some '\\r's in your buffer. And you should probably only fwrite strlen(string) bytes. – Daniel Fischer