根据https://en.cppreference.com/w/cpp/string/basic_string/getline: 从输入中提取字符并将它们附加到 str 直到发生以下情况之一(按列出的顺序检查) 输入的文件结束条件,在这种情况下,getline 设置 eofbit。 下一个可用的输入字符是 delim,由 Traits::eq(c, delim) 测试,在这种情况下,
sets whether C++ and C I/O libraries are interoperable (public static member function of std::ios_base) Member classes failure stream exception (public member class of std::ios_base) Init initializes standard stream objects (public member class of std::ios_base) Member types and...
From cppreference.com <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
1-2%29有效呼叫rdbuf()->open(filename, mode | ios_base::in).%28见std::basic_filebuf::open有关调用%29的效果的详细信息。仅在下列情况下才提供过载%282%29std::filesystem::path::value_type不是char.%28自C++17%29 3-4%29有效调用%281-2%29open(filename.c_str(), mode)... ...
4-5%29basic_ifstream(filename.c_str(), mode)... 6%29移动构造函数。首先,将基类从other%28不影响rdbuf()指针%29,然后移动-构造std::basic_filebuf成员,然后调用this->set_rdbuf()安装新的basic_filebuf就像rdbuf()基类中的指针。 7%29复制构造函数被删除:该类不可复制. ...
例如,C++ Primer或cppreference.com都是很好的参考资源。 4. 修改代码 根据文档调整构造函数的调用,确保参数类型、数量和顺序正确。以下是一些正确的示例: cpp // 使用C风格字符串 std::ifstream file1("example.txt"); // 使用std::string std::ifstream file2(std::string("example.txt")); // 使用文件...
From cppreference.com <cpp |io |basic ifstream C++ String I/O basic_ostringstream basic_stringstream Array I/O basic_ispanstream (C++23) basic_ospanstream (C++23) basic_spanstream (C++23) istrstream (deprecated in C++98) ostrstream ...
1 头文件 #include <iostream> #include <fstream> #include <string> 2 读取一行 void UsingifstreamReadLineMethod() { char szBuf[256] = { 0 }; std::ifstream fileHandle("E:/thriftserver/output/facealarmnew.txt"); fileHandle.getline(szBuf, 100); ...
#include <iostream> #include <fstream> using namespace std; int main() { char c; string fileName = "fileToOpen.txt"; string fileContent; ifstream file; file.open(fileName.c_str(), ifstream::in); if(file.is_open()) { cout << "File opened successfully" << endl; while(file.good...
仅若 std::filesystem::path::value_type 非 char 才提供重载 (3) 。 (C++17 起) 4-5) 同 basic_ifstream(filename.c_str(), mode) 。 6) 移动构造函数:首先,从 other 移动构造基类(这不影响 rdbuf() 指针),然后移动构造 std::basic_filebuf...