fopen

对文件的输入输出

由 一曲冷凌霜 提交于 2020-01-22 02:40:58
1. 什么是文件 文件分为两种， 程序文件 和 数据文件 程序文件。包括源文件(后缀为.c)、目标文件(后缀为.obj)、可执行文件(后缀为.exe)等。这种文件的内容是可执行代码。 数据文件。如一批学生的成绩数据等。 2. 打开与关闭文件 fopen函数打开数据文件，fclose函数关闭数据文件。 通常将 fopen 函数的返回值赋给一个指向文件的指针变量 FILE *fp ; // 定义一个指向文件的指针变量 fp = fopen("a1", "r"); 用 fclose 函数关闭数据文件 fclose(fp); 3. 顺序读写数据文件 怎样向文件读写字符 栗1：   从键盘输入一些字符，逐个把它们送到磁盘上去，直到用户输入一个"#"为止 # include <stdlib.h> # include <stdio.h> int main ( ) { FILE * fp ; char ch , filename [ 10 ] ; printf ( "请输入所用的文件名：" ) ; scanf ( "%s" , filename ) ; if ( ( fp = fopen ( filename , "w" ) ) == NULL ) // 打开输出文件并使fp指向此文件 { printf ( "无法打开此文件\n" ) ; // 如果打开时出错，就输出"打不开"的信息 exit (

文件读取

由 点点圈 提交于 2020-01-21 23:56:21
#include <stdio.h> int main(int argc,char *argv[]) { FILE *fp; //fp=fopen(argv[1],"w"); fp=fopen("yaoyang.txt","w"); fprintf(fp,"yaoyang\t%d\n",10); fclose(fp); return 0; } 若没有该文件，系统会自动创建该文件。 fp是文件指针，char 类型。 FILE是结构体，FILE*是结构体指针，typedef定义的FILE. 来源： CSDN 作者： captionyao 链接： https://blog.csdn.net/qq_38436175/article/details/104065997

Write to XML file using fopen in Wordpress

由 断了今生、忘了曾经 提交于 2020-01-21 19:32:21
问题 I'm trying to write to an XML file in the uploads folder in my Wordpress directory. This XML needs to update each time the client updates or creates a new post using a custom post_type I created. Here is the code: <? add_action( 'save_post', 'producers_xml' ); function producers_xml(){ if ($_POST['post_type'] == 'producer') { $xml = new SimpleXMLElement('<xml/>'); $producers = get_posts( array( 'post_type'=>'producer', 'numberposts'=>-1 ) ); $xml->addChild('producers'); foreach($producers as

Write to XML file using fopen in Wordpress

由 为君一笑 提交于 2020-01-21 19:31:26
问题 I'm trying to write to an XML file in the uploads folder in my Wordpress directory. This XML needs to update each time the client updates or creates a new post using a custom post_type I created. Here is the code: <? add_action( 'save_post', 'producers_xml' ); function producers_xml(){ if ($_POST['post_type'] == 'producer') { $xml = new SimpleXMLElement('<xml/>'); $producers = get_posts( array( 'post_type'=>'producer', 'numberposts'=>-1 ) ); $xml->addChild('producers'); foreach($producers as

fopen won't open files across network

由 筅森魡賤 提交于 2020-01-21 10:27:25
问题 I can use fopen to open local files but can't open files across network on a different machine. I can map the drives and look at the files but can't open them using fopen. 回答1: Assuming you're running Apache on Windows (since you talk about "mapping" the drive): If you used the defaults during installation then apache is running with the Local System account, which doesn't have any network privileges. So you have to make sure it runs as a (domain) user that can access the network drive(s).

fopen won't open files across network

由 断了今生、忘了曾经 提交于 2020-01-21 10:26:06
问题 I can use fopen to open local files but can't open files across network on a different machine. I can map the drives and look at the files but can't open them using fopen. 回答1: Assuming you're running Apache on Windows (since you talk about "mapping" the drive): If you used the defaults during installation then apache is running with the Local System account, which doesn't have any network privileges. So you have to make sure it runs as a (domain) user that can access the network drive(s).

文件输入输出

由 二次信任 提交于 2020-01-17 01:37:01
#define LOCAL #include <iostream> #include <string> #include <cstring> #include <cstdlib> #include <cstdio> #include <cmath> #include <algorithm> #include <stack> using namespace std; #define mem(a,b) memset(a,b,sizeof(a)) #define pf printf #define sf scanf #define debug printf("!\n") #define INF 10000 #define MAX(a,b) a>b?a:b #define blank pf("\n") #define LL long long #ifdef LOCAL freopen("data.in","r",stdin); freopen("data.out","w",stdin); #endif // LOCAL 重定向 int main() { File *fin,*fout; fin = fopen("data.in","rb"); fout = fopen("data.out","wb"); int m; fsf("%d",&m); fpf("%d\n",m); fclose

error on using @fopen

由 為{幸葍}努か 提交于 2020-01-16 19:06:06
问题 I'm using @fopen to open a file in "rb" mode. the file that im opening here is running with no errors but if i open that file using @fopen then it is giving error. code is something like this--- $file = @fopen("xyz.com","rb") or $flag=1; if($flag==1) { mail($to, $subject, $message, $from); die(); } sometimes it opens up without sending any error mail but sometimes it starts giving so many error mails. what is the solution to open this url without having any error mail? plz help!! 回答1: If you

error on using @fopen

由 吃可爱长大的小学妹 提交于 2020-01-16 19:05:45
问题 I'm using @fopen to open a file in "rb" mode. the file that im opening here is running with no errors but if i open that file using @fopen then it is giving error. code is something like this--- $file = @fopen("xyz.com","rb") or $flag=1; if($flag==1) { mail($to, $subject, $message, $from); die(); } sometimes it opens up without sending any error mail but sometimes it starts giving so many error mails. what is the solution to open this url without having any error mail? plz help!! 回答1: If you

PHP run loop and script at same time

由 故事扮演 提交于 2020-01-16 18:43:11
问题 I'm currently running a loop in my PHP script to check if the user connection has been aborted (connection_aborted() does not work on ajax calls): connection_check.php : <?php ignore_user_abort(true); for ($i = 0; $i < 1000; $i++) { echo "<br>"; flush(); ob_flush(); if (connection_aborted()) { echo "nocon"; exit; } else { // Everything is fine } sleep(3); } ?> However, I also need to run the rest of my PHP code while this loop is running in the "background" so that when the connection is
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