【C/C++】标准IO操作

fwrite实现文件复制

 //@　author　成鹏致远
 //@　net http://infodown.tap.cn
 //@　qq 552158509
 //@ blog　lcw.cnblogs.com

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 #define BUFSIZE 100

 int main(int argc, char * argv[])
 {
     FILE *read_fp,*write_fp;
     char buf[BUFSIZE];

     if( != argc)
     {
         printf("Usage:%s <origin_filename> <target_filename> \n",argv[]);
         exit();
     }
     if(NULL == (read_fp = fopen(argv[],"r")))
     {
         perror("malloc");
         exit();
     }
     if(NULL == (write_fp = fopen(argv[],"w")))
     {
         perror("malloc");
         exit();
     }

     while(!feof(read_fp) && !ferror(read_fp))
     {
         bzero(buf,BUFSIZE);//在使用前一定要先清缓冲
         fread(buf,BUFSIZE,,read_fp);//读取文件
         fwrite(buf,strlen(buf),,write_fp);//写文件，注意要用strlen，因为最后一次可以装不满缓冲区
     }

     fclose(read_fp);
     fclose(write_fp);

     return ;
 }

fgets实现文件复制

 //@　author　成鹏致远
 //@　net http://infodown.tap.cn
 //@　qq 552158509
 //@ blog　lcw.cnblogs.com

 //copy file by line

 #include <stdio.h>
 #include <stdlib.h>

 #define MAXSIZE 1024

 int main(int argc, char * argv[])
 {
     FILE *read_fp,*write_fp;
     char buf[MAXSIZE];

     if( != argc)
     {
         printf("Usage:%s <origin_filename> <target_filename> \n",argv[]);
         exit();
     }
     if(NULL == (read_fp = fopen(argv[],"r")))
     {
         perror("malloc");
         exit();
     }
     if(NULL == (write_fp = fopen(argv[],"w")))
     {
         perror("malloc");
         exit();
     }

     while(NULL != fgets(buf,MAXSIZE,read_fp))//fgets()浼氭妸'\n'绠楀湪缂撳啿鍖轰腑
     {
         fputs(buf,write_fp);//paste file
     }

     fclose(read_fp);
     fclose(write_fp);

     return ;
 }

fgetc实现文件

 //@　author　成鹏致远
 //@　net http://infodown.tap.cn
 //@　qq 552158509
 //@ blog　lcw.cnblogs.com

 //copy file by char

 #include <stdio.h>
 #include <stdlib.h>

 int main(int argc, char * argv[])
 {
     FILE *read_fp,*write_fp;
     char tmp;

     if( != argc)
     {
         printf("Usage:%s <origin_filename> <target_filename> \n",argv[]);
         exit();
     }
     if(NULL == (read_fp = fopen(argv[],"r")))
     {
         perror("malloc");
         exit();
     }
     if(NULL == (write_fp = fopen(argv[],"w")))
     {
         perror("malloc");
         exit();
     }

     while(EOF !=(tmp= fgetc(read_fp)))//copy file
     {
         fputc(tmp,write_fp);//paste file
     }

     fclose(read_fp);
     fclose(write_fp);

     return ;
 }