C Primer Plus(第五版)中文版,不用多说了

				/* reverse.c -- displays a file in reverse order */
				#include 
				#include 
				#define CNTL_Z '\032'   /* eof marker in DOS text files */
				#define SLEN 50
				int main(void)
				{
				    char file[SLEN];
				    char ch;
				    FILE *fp;
				    long count, last;
				
				    puts("Enter the name of the file to be processed:");
				    gets(file);
				    if ((fp = fopen(file,"rb")) == NULL)
				    {                      /* read-only and binary modes */
				        printf("reverse can't open %s\n", file);
				        exit(1);
				    }
				    
				    fseek(fp, 0L, SEEK_END);        /* go to end of file */
				    last = ftell(fp);
				/* if SEEK_END not supported, use this instead           */
				/*  last = 0;
				    while (getc(fp) != EOF)
				        last++;
				*/
				    for (count = last- 1; count >= 0; count--)
				    {
				        fseek(fp, count, SEEK_SET); /* go backward       */
				        ch = getc(fp);
				    /* for DOS, works with UNIX */
				        if (ch != CNTL_Z && ch != '\r')
				            putchar(ch);
				    /* for Macintosh            */
				    /*  if (ch == '\r')
				            putchar('\n');
				         else
				             putchar(ch)
				    */
				   }
				   putchar('\n');
				   fclose(fp);
				   
				   return 0;
				}