Question

Is it possible to use fprintf in such a way that write data to a compressed file?
For example:

fopen ("myfile.txt","w");

will write to a plain text file. So the file size grows very large.

Answer 1

You can use zlib to write data to a compressed stream.

gzFile fp;
fp = gzopen(NAME, "wb");
gzprintf(fp, "Hello, %s!\n", "world");
gzclose(fp);

Compile it like this:

gcc -Wall -Wextra -o zprog zprog.c -lz

Use zcat to print the contents of the file.