std::ifstream fileHandle("D:/mytext", std::ifstream::in | std::ifstream::binary); std::istreambuf_iterator<char> beg(fileHandle), end; std::string strWholeFileBuffer(beg, end); 1. 2. 3. 方法2 std::ifstream fileHandle("D:/mytext", std::ifstream::in | std::ifstream::binary);...
在C++中,`std::ifstream` 明显比 `FILE` 慢。这是因为 `std::ifstream` 是C++标准库中的一个文件流类,它用于处理文件,而 `FILE` 是一个C语言库中的文件...
file.close(); I know, now you'd say here I'm only reading as much as the file's size is, but that is actually more than 61 bytes. Also reading a fixed 100 is no problem. 0x1A1). std::ifstreamfile("G:/Pictures/Webcam/Snapshot_20110209.jpg", std::ios::binary)...
将二进制数据读入std::string是一个常见的需求,可以通过以下步骤实现: 1. 打开二进制文件:使用C++的文件流对象std::ifstream打开二进制文件。例如,可以使用以下代码打开名为"...
std::ifstream f(path, std::ios::in | std::ios::binary); // Obtain the size of the file. const auto sz = fs::file_size(path); // Create a buffer. std::string result(sz, '\0'); // Read the whole file into the buffer. f.read(result.data(), sz); return result; } ...
int main() { std::vector<std::string> filePaths{ "file1", "file2", ... }; // Many file paths int i = 0; for (const std::string& filePath : filePaths) { std::ifstream file(filePath, std::ios::binary); std::cout << i++ << std::endl; } return 0; } 我使用 MSVC...
std::ifstream file(path, std::ios::binary); std::vector<uint8_t> buffer(chunkSize); while (file.read(reinterpret_cast<char*>(buffer.data()), buffer.size())) { // 处理每个块 sendChunk(buffer); buffer.clear(); } if (file.gcount() > 0) { ...
<cpp |io |basic ifstream voidopen(constchar*filename, std::ios_base::openmodemode =std::ios_base::in); (1) voidopen(conststd::filesystem::path::value_type*filename, std::ios_base::openmodemode =std::ios_base::in); ...
=std::ios_base::out); (1) voidopen(conststd::filesystem::path::value_type*filename, std::ios_base::openmodemode =std::ios_base::out); (2)(since C++17) voidopen(conststd::string&filename, std::ios_base::openmodemode =std::ios_base::out); ...
Example 1:Seek to the beginning of the file #includeusingnamespacestd;intmain(){ifstreamfile("example.txt");// Seek to the beginning of the filefile.seekg(0,ios::beg);// ... rest of the code ...return0;} In this example, we create an ifstream object that reads from the file "...