writefile

error: could not convert from 'std::string* {aka std::basic_string<char>*}' to 'std::string {aka std::basic_string<char>}'|

由 核能气质少年 提交于 2019-12-25 18:32:48
问题 I'm trying to make a function that writes a file but i'm having issues passing a string as a parameter. void writeFile(string filename, string letters, int size) { ofstream outputfile("output.txt"); outputfile << letters; outputfile.close(); } int main() { string letters[] = {"u", "l", "s", "n","m", "z", "a", "p", "b"}; int size = 9; string filename = "Inputfile.txt"; writeFile(inputfilename.c_str(),letters,size); } And having this error. error: could not convert from 'std::string* {aka std:

Save byte array to file node JS

由 可紊 提交于 2019-12-23 02:42:36
问题 I want to save bytearray to a file in node js, for android I'm using the below code sample. Can any once suggest me the similar approach? File file = new File(root, System.currentTimeMillis() + ".jpg"); if (file.exists()) file.delete(); FileOutputStream fos = null; try { fos = new FileOutputStream(file); fos.write(bytesarray); fos.close(); return file; } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } 回答1: Use fs.writeFile to write

NodeJS笔记: 文件操作大全

由 断了今生、忘了曾经 提交于 2019-12-18 18:27:03
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 文件I/O fs模块的基本用法 开发中我们经常会有文件I/O的需求，node.js中提供一个名为fs的模块来支持I/O操作，fs模块的文件I/O是对标准POSIX函数的简单封装。 writeFile函数的基本用法 文件I/O，写入是必修课之一。fs模块提供writeFile函数，可以异步的将数据写入一个文件, 如果文件已经存在则会被替换。用法如下： 例： fs.writeFile(filename, data, callback) var fs= require("fs"); fs.writeFile('test.txt', 'Hello Node', function (err) { if (err) throw err; console.log('Saved successfully'); //文件被保存 }); appendFile函数的基本用法 writeFile函数虽然可以写入文件，但是如果文件已经存在，我们只是想添加一部分内容，它就不能满足我们的需求了，很幸运，fs模块中还有appendFile函数，它可以将新的内容追加到已有的文件中，如果文件不存在，则会创建一个新的文件。使用方法如下： 例： fs.appendFile(文件名,数据,编码,回调函数(err)); var fs= require(

Read data from a text file and create an object

由 泪湿孤枕 提交于 2019-12-18 12:42:10
问题 I need some help: I'm making a Supermarket simulation on Java, but I've got one problem, I have a text file (Stock.txt) where I have all the supermarket stock on it for example: 0-Bakery-Chocolate Cake-$12.5-250 1-Meat-Premium Steak-$2.6-120 2-Seafood-Tuna - $1.2-14 ... Where the first number is the "id" for the product, next is the department the product belongs, third is the name of the product, the next thing is the price, and the last number is how much pieces of the product the stock has

Why does WriteFile crash when writing to the standard output?

由 孤者浪人 提交于 2019-12-18 07:36:47
问题 Here's a "Hello world" program that uses WinAPI's WriteFile (compiled in Microsoft Visual C++ 2008 Express): int _tmain(int argc, _TCHAR* argv[]) { wchar_t str[] = L"Hello world"; HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE); if(out && out!=INVALID_HANDLE_VALUE) { WriteFile(out, str, sizeof(str), NULL, NULL); CloseHandle(out); } return 0; } If executed in a console window, it happily greets the world. If you try to redirect its standard output, however, as in hello.exe > output.txt the

“ReadFile Function” is there a way that I can no longer declare specific number of bytes to be read?

由 安稳与你 提交于 2019-12-13 17:24:48
问题 I'm trying to make a program using windows API in C++ The goal is to read the content of the text file that I've created and able to manipulate the content using bitwise XOR (change to lowercase and uppercase, vice versa) then put the manipulated content again inside of a text file. Here the flow of the program that I've used: Open text file using CreateFile. Put the content of the text file on a created malloc. Manipulate the content of the text file using bitwise XOR (xor = 20). Then put

Windows WriteFile blocks even with FILE_FLAG_OVERLAPPED

由 非 Y 不嫁゛ 提交于 2019-12-11 16:28:53
问题 I have the following code that creates a file using CreateFile with the FILE_FLAG_OVERLAPPED flag, and then calls WriteFile 100 times in a loop, passing in an OVERLAPPED structure uint64_t GetPreciseTickCount() { FILETIME fileTime; GetSystemTimePreciseAsFileTime(&fileTime); ULARGE_INTEGER large; large.LowPart = fileTime.dwLowDateTime; large.HighPart = fileTime.dwHighDateTime; return large.QuadPart; } uint64_t g_blockedTime = 0, g_waitTime = 0; int main() { auto hFile = CreateFile( L"test.dat"

Writing to OSX's /Library/Application Support folder throws IOException: Permission denied

由 跟風遠走 提交于 2019-12-11 10:33:55
问题 I'm trying to store my app's data to /Library/Application Support/myAppFolder. I am trying with this code (via debug) String content = "This is the content to write into file"; File file = new File("/Library/Application Support/filename.txt"); // if file doesnt exists, then create it if (!file.exists()) { file.mkdir(); file.createNewFile(); } FileWriter fw = new FileWriter(file.getAbsoluteFile()); BufferedWriter bw = new BufferedWriter(fw); bw.write(content); bw.close(); System.out.println(

WritePrivateProfileString is not adding property to the end

由 蹲街弑〆低调 提交于 2019-12-11 02:09:03
问题 I am writing some properties in a ini file using WritePrivateProfileString function and everything works fine but when I add text with multiple lines, there is a problem. Here is the code and output. WritePrivateProfileString(_T("General"), _T("Name"), OLE2CT(text), FilePath); Output: [General] Name=mytext . text = address\nstreet\nhouse WritePrivateProfileString(_T("General"), _T("Address"), OLE2CT(text), FilePath); Output: [General] Name=mytext Address=address street house But when after

Writing to file, file being used by another process

由 ￡可爱￡侵袭症＋ 提交于 2019-12-11 01:24:53
问题 Alright, so I can't figure out why I can't write to a file. It says it's being used by another process. Here's the error (IOException was unhandled): The process cannot access the file 'C:\Temp\TempFile.cfg' because it is being used by another process. Here's the current code I'm using to write to the file: Dim myConfig Dim saveFileDialog1 As New SaveFileDialog() saveFileDialog1.Filter = "Configuration Files (*.cfg)|*.cfg" saveFileDialog1.FilterIndex = 2 saveFileDialog1.RestoreDirectory =
订阅 writefile