C++ - Read and print whole file

Question

Like in the topic, I'd like to read from standard input and print to standard output whole file with no difference between them.

program < data.txt > data.out
diff data.txt data.out // <- the same

File contains Unicode letters.

I've managed write following piece of code:

char s[100000];

int main()
{
    setmode(1, _O_BINARY);

    char *n;

    do {
        n = gets(s);
        s[strlen(s)-1] = '\n';
        printf("%s", s);
    }
    while(n);

    return 0;
}

but input and output is slighty different (input: 76 465KB, output: 76 498KB)

Thanks in advance.

EDIT:

Now, it's only 2KB difference.

EDIT:

It's OK.

Yes, and you use `char s[100000]` `setmode`, `char*`, `gets`, `strlen` too, which are not C++ — Cyrille, Apr 30 '14 at 12:06

score 3 · Accepted Answer · edited May 23 '17 at 12:28

3

It could happen if the input file has \n line endings. The output file will have \r\n line endings on Windows. That could explain the difference.

If you don't want to output the \rs, you can follow this answer

edited May 23 '17 at 12:28

Community

1
1

answered Apr 30 '14 at 11:40

zmbq

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First make sure that is indeed the difference. – zmbq Apr 30 '14 at 11:42

C++ - Read and print whole file

1 Answers1