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)...
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...
#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::...
ifstream *inFile =newifstream(szFile); std::wstring szwFileStr((std::istreambuf_iterator<wchar_t>(*inFile)),std::istreambuf_iterator<wchar_t>()); It fails,on the bold part Need the string, containing the input from the file, to be a std::wstring (needs to handle somce chars, no...
ifstream java_使用ifstream :: seekg和tellg获取文件大小
• 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...
(data.size()==0) return -1; double lastUpPoint=data[0].p; double lastDownPoint=data[0].p; int upLen=1; int downLen=1; for(int 1=1;i<data.size();i++) { while(i<data.size()&&data[i].p>=data[i-1].p){ i++; } int tempUpLen=i-tempUpIndex1; if (upLen<tempUpLen...
outfile.close(); // open a file in read mode. std::ifstream infile; infile.open("E:...::endl; fout std::endl; fout.close(); // Read from file std::ifstream fin(filename.c_str...((char *)&d, sizeof(double)); fout.close(); // Read from file std::ifstream...