wbin.c

linux下的Ｃ语言开发

/*-*/
/********************************************************
 * Question:						*
 *	The routine fputc can be used to		*
 *	write out a single byte of a binary		*
 *	file.  The following program writes out		*
 *	numbers 0 to 127 to a file called		*
 *	test.out.  It works just fine on		*
 *	UNIX, creating a 128-byte long file;		*
 *	however, on DOS, the file contains 129		*
 *	bytes.  Why?					*
 ********************************************************/
/*+*/
#include <stdio.h>
#include <stdlib.h>	
#ifndef __MSDOS__
#include <unistd.h>
#endif __MSDOS__

int main()
{
    int cur_char;   /* current character to write */
    FILE *out_file; /* output file */

    out_file = fopen("test.out", "w");
    if (out_file == NULL) {
        fprintf(stderr,"Can not open output file\n");
        exit (8);
    }

    for (cur_char = 0; cur_char < 128; ++cur_char) {
        fputc(cur_char, out_file);
    }
    fclose(out_file);
    return (0);
}