在这个示例中,getFileSize函数接受一个文件路径作为参数,并返回该文件的大小(以字节为单位)。如果文件无法打开,它将返回一个特殊值(例如-1)来表示错误,并在main函数中处理这种情况。
void ReadLineByifstream() { char szBuffer[2560] = { 0 }; std::ifstream fileHandle("F:/ffmpeg/file/32497272.h264", std::ifstream::in | std::ifstream::binary); fileHandle.getline(szBuffer, 2560); size_t nLen = strlen(szBuffer); std::cout << nLen << std::endl; fileHandle.clos...
unsigned char* pFileBytes = nullptr; unsigned int nTotalSize = 0; std::ifstream infile("1.dat", std::ios_base::in | std::ios_base::binary); if (infile.is_open()) { infile.seekg(0, std::ios_base::end); unsigned long long nFileSize = infile.tellg(); if (0 == nFileSize)...
该文件被分成几个部分(“记录”),按顺序使用。所以我对这样的事情感兴趣: GetFile(string filename, size_t num_records) : filename(filename,当队列变低时,需要一个条件变量和另一个线程来填充队列。这里有最好的做法吗?我只想把它保存在C++14代码中,尽管如果有库做这种事情,我很好奇它 浏览3提问于2015-...
随着 Visual Studio 2019 更新，在 Visual Studio 中编写代码的时候也带来了基于 Roslyn 的代码质量分析...
// insert path to test file here std::ifstream ifs(path.c_str()); if(!ifs) { std::cout << "Failed to open the file." << std::endl; return EXIT_FAILURE; } int n = 0; std::string t; while(!safeGetline(ifs, t).eof()) ++n; std::cout << "The file contains " << n...
#include <fstream>#include <iostream>#include <string>intmain(){std::stringfilename="Test.b";// 准备读取文件doubled=3.14;std::ofstream(filename, std::ios::binary).write(reinterpret_cast<char*>(&d), sizeof d)<<123<<"abc";// 打开文件以读取std::ifstreamistrm(filename, std::ios::...
#include <fstream> #include <iostream> #include <string> int main() { std::string filename = "Test.b"; // prepare a file to read double d = 3.14; std::ofstream(filename, std::ios::binary) .write(reinterpret_cast<char*>(&d), sizeof d) << 123 << "abc"; // open file for...
• clear data inside text file in c++ • fstream won't create a file • C++: variable 'std::ifstream ifs' has initializer but incomplete type • How to read line by line or a whole text file at once? • Using C++ filestreams (fstream), how can you determine the size of ...
ifstream java_使用ifstream :: seekg和tellg获取文件大小