Currently I am using following function to get the temporary folder path for current user: string tempPath = System.IO.Path.GetTempPath(); On some machines it gives me temp folder path of current user like: C:Documents and SettingsadministratorLocal SettingsTemp On some machines it gives me system temp folder path like: C:WindowsTEMP MSDN Documentation also says that above API returns c
目前我正在使用以下功能获取当前用户的临时文件夹路径: string tempPath = System.IO.Path.GetTempPath(); 在某些机器上,它给了我当前用户的临时文件夹路径,例如: C: Documents and Settings administrator Local Settings Temp 在一些机器上,它给了我系统临时文件夹路径,如: C: WINDOWS TEMP MSDN文档也说上面的API返回当前系统的临时文件夹。 有没有其他可用的API可以给我当前用户的临时文件夹路径
How do you install perl modules on linux and mac platforms on Travis CI when the language is not set to perl? I'm compiling a C program with perl test scripts. If the language is perl, cpanm is available: cpanm JSON Otherwise if the platform is linux: sudo apt-get install libjson-pp-perl But when on mac cpanm and apt-get are not available. The mac platform has the brew command availab
当语言未设置为perl时,如何在Travis CI上的Linux和Mac平台上安装perl模块? 我正在用perl测试脚本编译一个C程序。 如果语言是perl, cpanm可用: cpanm JSON 否则,如果平台是Linux的话: sudo apt-get install libjson-pp-perl 但是当mac cpanm和apt-get不可用时。 mac平台有brew命令可用于安装程序,但我无法弄清楚是否需要安装新版本的perl,而不是仅用于系统perl版本的模块。 mac版本也有可用的cpan JSON命令,但
This question already has an answer here: What's the best way to check if a file exists in C? (cross platform) 8 answers On Windows, there is PathFileExists(). On a POSIX system, you have stat() or access(). That said, if you check for existence of the file because your code needs the file, this is the wrong approach -- file systems are out of your program's control, so this woul
这个问题在这里已经有了答案: 检查C文件是否存在的最佳方法是什么? (跨平台)8个答案 在Windows上,有PathFileExists()。 在POSIX系统上,你有stat()或access()。 也就是说,如果您检查文件是否存在,因为您的代码需要该文件,这是错误的方法 - 文件系统超出了您的程序控制范围,所以这将是竞争条件,唯一正确的方法是正确在打开文件时处理错误。 你正在以错误的方式思考问题。 你不应该“检查一个文件是否
In all programming languages (that I use at least), you must open a file before you can read or write to it. But what does this open operation actually do? Manual pages for typical functions dont actually tell you anything other than it 'opens a file for reading/writing': http://www.cplusplus.com/reference/cstdio/fopen/ https://docs.python.org/2/library/functions.html#open Obvio
在所有编程语言中(我至少使用过),在读取或写入文件之前,您必须先打开一个文件。 但是这个开放操作实际上做了什么? 典型功能的手册页实际上不会告诉你任何东西,除非它'打开一个文件来读/写': http://www.cplusplus.com/reference/cstdio/fopen/ https://docs.python.org/2/library/functions.html#open 显然,通过使用这个函数,你可以告诉它涉及到创建某种对象,这有助于访问一个文件。 如果我要实现
I have attempted to make a file to read a text file that contains CSVs. For some reason however some of the Fscanfs do not return a value but some do. FILE* reader; char OptionOne[30]=""; char OptionTwo[30]=""; char OptionThree[30]=""; char OptionFour[30]=""; char answer[1]=""; char CorrectAnswer[1]; char Question[51]; reader = fopen("C:\Users\Finley\Desktop\Programming\QuizMachine\QuizMachine
我试图制作一个文件来读取包含CSV的文本文件。 但是由于某些原因,一些Fscanfs并没有返回一个值,但有些值得。 FILE* reader; char OptionOne[30]=""; char OptionTwo[30]=""; char OptionThree[30]=""; char OptionFour[30]=""; char answer[1]=""; char CorrectAnswer[1]; char Question[51]; reader = fopen("C:\Users\Finley\Desktop\Programming\QuizMachine\QuizMachine\fscanf_questions.txt", "r"); if (reader == NU
I want my program to open a file if it exists, or else create the file. I'm trying the following code but I'm getting a debug assertion at freopen.c. Would I be better off using fclose and then fopen immediately afterward? FILE *fptr; fptr = fopen("scores.dat", "rb+"); if(fptr == NULL) //if file does not exist, create it { freopen("scores.dat", "wb", fptr); }
我希望我的程序在存在的情况下打开文件,或者创建文件。 我想下面的代码,但我在freopen.c得到一个调试断言。 我会使用fclose更好,然后立即打开吗? FILE *fptr; fptr = fopen("scores.dat", "rb+"); if(fptr == NULL) //if file does not exist, create it { freopen("scores.dat", "wb", fptr); } 您通常必须在单个系统调用中执行此操作,否则您将获得竞争条件。 这将打开阅读和写作,如有必
The code I have is as follows: FILE *txt_file = fopen("data.txt", "r"); if (txt_file == NULL) { perror("Can't open file"); } The error message returned is: Can't open file: No such file or directory The file 'data.txt' definitely exists in the working directory (it exists in the directory that contains my .c and .h files), so why is fopen() is returning a NULL pointer? Is
我拥有的代码如下所示: FILE *txt_file = fopen("data.txt", "r"); if (txt_file == NULL) { perror("Can't open file"); } 返回的错误消息是: 无法打开文件:没有这样的文件或目录 文件'data.txt'肯定存在于工作目录中(它存在于包含我的.c和.h文件的目录中),那为什么fopen()返回一个NULL指针呢? 有没有可能文件名不是真的“data.txt”? 在Unix上,文件名实际上是字节串而不是字符串,并且可以在
I am not able to flush stdin here,is there a way to flush stdin?If not then how to make getchar() to take a character as input from user, instead of a "n" left by scanf in the input buffer?? #include "stdio.h" #include "stdlib.h" int main(int argc,char*argv[]) { FILE *fp; char another='y'; struct emp { char name[40]; int age; float bs; }; s
我不能在这里刷新stdin,有没有办法刷新stdin?如果没有,那么如何让getchar()将一个字符作为用户的输入,而不是输入缓冲区中的scanf留下的“ n”? ? #include "stdio.h" #include "stdlib.h" int main(int argc,char*argv[]) { FILE *fp; char another='y'; struct emp { char name[40]; int age; float bs; }; struct emp e; if(argc!=2) { printf("please write
How to handle file name in System.IO classes in a cross-platform manner to make it work on Windows and Linux? For example, I write this code that works perfectly on Windows, however it doesn't create a file on Ubuntu Linux: var tempFilename = $@"..Datauploads{filename}"; using (FileStream fs = System.IO.File.Create(tempFilename)) { file.CopyTo(fs); fs.Flush(); }
如何以跨平台的方式处理System.IO类中的文件名,以使其在Windows和Linux上运行? 例如,我编写了可在Windows上完美工作的代码,但它不会在Ubuntu Linux上创建文件: var tempFilename = $@"..Datauploads{filename}"; using (FileStream fs = System.IO.File.Create(tempFilename)) { file.CopyTo(fs); fs.Flush(); } Windows使用反斜杠。 使用Slash的Linux。 Path.Combine设置正确的符号:
I've read about disposing objects/IDisposable interface and destructors in C#, but to me they seem to do the same thing? What is the difference between the two? Why would I use one over the other? In fact, in this example (link below) this code uses both the IDisposable interface and a destructor: http://msdn.microsoft.com/en-us/library/system.idisposable.aspx The comment says the des
我已经阅读了关于在C#中处理对象/ IDisposable接口和析构函数的问题,但对我来说他们似乎也是这样做的? 两者有什么区别? 为什么我会用另一种呢? 事实上,在这个例子中(下面的链接),这段代码使用了IDisposable接口和析构函数: http://msdn.microsoft.com/en-us/library/system.idisposable.aspx 评论说,析构函数是如果不使用终结代码,但我该如何决定何时使用终结代码? 我写了一篇相当深入的文章,有助于解释