s8_11.c

来自「水电出版社的《C/C++程序设计教程》源代码」· C语言 代码 · 共 31 行

          #include "stdio.h"
          #include "io.h"
          #define BUFFSIZE 512
          main(argc,argv)
          int argc;
          char *argv[ ];
          {
             char buf[BUFFSIZE];
             int nr,fdr,fdw;
             if(argc<3)
             {
                printf("you forgot to enter a filename\n");
                exit(0);
             }
             if((fdr=open(argv[1],0))==-1)
             {
                printf("cannot open input file\n");
                exit(0);
             }
             if((fdw=creat(argv[2],1))==-1)
             {
                printf("%s",argv[2]);
                printf("cannot open output file!\n");
                exit(0);
             }
             while((nr=read(fdr,buf,BUFFSIZE))>0)
                write(fdw,buf,nr);
             close(fdr);
             close(fdw);
          }