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£Ûת£Ý¹¹Ôì c++ IDE(linux)

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set encoding=utf-8
syntax enable
syntax on
filetype on
set tabstop=4
set softtabstop=4
set shiftwidth=4
set cindent
set autoindent
filetype plugin indent on
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Linux ϵĴíÎó error.h

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fprintf(fp, "%s", strerror(errno))
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#include <stdio.h>
#include <stdlib.h>
#include<errno.h>
int main(void)
{
FILE *fp;
if((fp=fopen("aaa.txt","r+"))==NULL)
{
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