请问fdopen需要fclose吗

[kanwolf]

#include <stdio.h>
#include <fcntl.h>

int main(void)
{
int fp = -1;
FILE *fp2 = NULL;
char a[10] = "123\n";
fp = open("./9.txt",O_RDWR|O_CREAT);
if (-1 == fp)
{
perror("open fail:");
}
fp2 = fdopen(fp,"w");
if (NULL == fp2)
{
perror("error num:");
}
fwrite(a,sizeof(char),sizeof(a),fp2);
fclose(fp2);
close(fp);
return 0;
}

请问fclose和close都需要吗？为什么

[kanwolf]

为什么我排版排的好好的，回复出来会这样

[brookmill]

fclose即可，他会自动关闭对应的文件描述符，所以就不需要close了。 http://blog.csdn.net/xiaofeng_yan/article/details/6165893 $ man fdopen ...... The file descriptor is not dup'ed, and will be closed when the stream created by fdopen() is closed

[brookmill]

fp就是文件指针file pointer，fd是文件描述符file descriptor，给变量起名字的时候最好不要混用，否则看代码的人会迷糊的。

        int fd = -1;
        FILE *fp2 = NULL;
        fd = open("./9.txt",O_RDWR|O_CREAT);
        fp2 = fdopen(fp,"w");

[brookmill]

关于发代码排版，要在上边那一排按钮里面找到“代码”然后选c/c++，然后在紧挨着的两个中括号之间写代码或者粘贴进去

[tnn1234]

太感谢了，哥们