s8_10.c

水电出版社的《C/C++程序设计教程》源代码

          #include "stdio.h"
          #include "io.h"
          main()
          {
             int fd,i;
             char buf[50];
             if((fd=open("a1",0))==-1)
             {
                printf("cannot open this file\n");
                exit(0);
             }
             if(read(fd,buf,50)!=50)
               printf("possible read error");
             for(i=0;i<50;i++)
                putchar (buf[i]);
             close(fd);
         }