=== lzw.cpp Source Code for LZW File Compression===[[Media:lzw.cpp]]<pre>

  /******************************************************************** ** ** This program gets a file name from the command line. It compresses the ** file, placing its output in a file named test.lzw. It then expands ** test.lzw into test.out. Test.out should then be an exact duplicate of ** the input file. ** *************************************************************************/   main(int argc, char *argv[]) { clock_t timer; CLZWCompressFile lzw;   /* ** Get the file name, open it up, and open up the lzw output file[Media:LZW. */  if (argc==1)  {  printf("Input file name to compress?\n");  return 0;  }    printf("testing %s...\n", argv[1zip]); /* ** Compress the file. */  timer = clock();  int crunch = lzw.Compress(argv[1], "test.lzw");  timer = clock() - timer; //CLOCKS_PER_SEC  printf("compress time=%d ms, encoding=%d, size=%u", timer, lzw.get_bits(), crunch);  int filesize = lzw.u_io;  printf(" (ratio=%d%%)\n", filesize ? (filesize-crunch)*100/filesize : 0);  if(lzw.AnyIOErrors())  printf("***I/O ERROR***\n");   /* ** Expand the file. */  timer = clock();  int orig = lzw.Expand("test.lzw", "test.out");  timer = clock() - timer; //CLOCKS_PER_SEC  printf("expand time=%d ms, encoding=%d\n", timer, lzw.get_bits());  if(lzw.AnyIOErrors())  printf("***I/O ERROR***\n");    ATLASSERT(filesize == orig); // did we mangle the file?  return 0; }</pre>