26.c

这份资料是《C语言时尚编程百例》一书所附带的光盘上面的全部内容详细具体！

#include <dos.h>
#include <stdio.h>
#include <string.h>
/*开始修改为固定返回符00h*/

main()
{
	char errorkkj[35], filename[20], *ptr, *data_all;
	static char readerror[] = "读文件失败!";
	FILE* stream;
	int length;
	printf("请输入需要加密的文本文件名:");
	gets( filename );
	stream = fopen( filename, "rb"); /*打开二进制文本文件*/
	
	if( stream == NULL )
	{
		printf("\007");
		printf("\007");
		strcpy( errorkkj, readerror );
		strcat( errorkkj, filename );
		printf("%s", errorkkj );
		printf("\007");
	}
	else
	{
		fseek( stream, 2, SEEK_END );
		length = ftell( stream );
		data_all = ( char* )calloc((unsigned)length, sizeof(char));
		if( !data_all )
		{
			printf("出现错误，请检查后再运行！");
			exit(1);
		}
		rewind( stream );
		while( !feof( stream )) /*修改为返回符00h*/
		fscanf( stream, "[\x00]", data_all );
		while( ptr = strrchr( data_all, '\n'))
			strnset( ptr, '\x00', 1 );
	}
	rewind( stream );
	fwrite( data_all, 1, length, stream );
	fclose( stream );
}