【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(3 != argc)
    {
        printf("Usage:%s <origin_filename> <target_filename> 
",argv[0]);
        exit(1);
    }
    if(NULL == (read_fp = fopen(argv[1],"r")))
    {
        perror("malloc");
        exit(1);
    }
    if(NULL == (write_fp = fopen(argv[2],"w")))
    {
        perror("malloc");
        exit(1);
    }

    while(!feof(read_fp) && !ferror(read_fp))
    {
        bzero(buf,BUFSIZE);//在使用前一定要先清缓冲
        fread(buf,BUFSIZE,1,read_fp);//读取文件
        fwrite(buf,strlen(buf),1,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 0;
}

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(3 != argc)
    {
        printf("Usage:%s <origin_filename> <target_filename> 
",argv[0]);
        exit(1);
    }
    if(NULL == (read_fp = fopen(argv[1],"r")))
    {
        perror("malloc");
        exit(1);
    }
    if(NULL == (write_fp = fopen(argv[2],"w")))
    {
        perror("malloc");
        exit(1);
    }

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

    fclose(read_fp);
    fclose(write_fp);

    return 0;
}

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(3 != argc)
    {
        printf("Usage:%s <origin_filename> <target_filename> 
",argv[0]);
        exit(1);
    }
    if(NULL == (read_fp = fopen(argv[1],"r")))
    {
        perror("malloc");
        exit(1);
    }
    if(NULL == (write_fp = fopen(argv[2],"w")))
    {
        perror("malloc");
        exit(1);
    }

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

    fclose(read_fp);
    fclose(write_fp);


    return 0;
}