1、主程序源代码:iotest.cpp 1/*file_name = iotest.cpp2*3* date = "2024-01-11"4*5**/678#include <iostream>9#include <fstream>10#include <string>11#include <locale>121314usingnamespacestd;151617voidread_from_keybord()18{19stringptin ="[ Input a string ]:";20stringptout ="[ Out...
voidUtil::readFile22(stringfileName) { fstream rFile(fileName, ios::in);if(!rFile.is_open()) { cout<<"Open"<< fileName <<"failed!"<<endl;return; }longdoublenum =0;stringline;while(getline(rFile, line)) {if(!fmod(++num,1000000)) { cout<<fixed<<"Num="<< num <<",value=...
#include <iostream> #include <fstream> #include <vector> int main() { const char* file_name = "example.txt"; std::ifstream file(file_name, std::ios::binary | std::ios::ate); if (!file.is_open()) { std::cerr << "无法打开文件: " << file_name << std::endl; return 1; ...
#include <fstream>istream& read( char* buffer, streamsize num );ifstream fin( "/tmp...
fstream读写文件read_使用同一个fstream 大家好,又见面了,我是你们的朋友全栈君。 1.fstream是什么? fstream是C++标准库中面向对象库的一个,用于操作流式文件。 fstream本质上是一个class,提供file操作的各种方法。 2.关系图 basic_fstream是一个类模板,暂且不用深入理解它。我们关心的事,它前面继承的那一堆...
(){ fstream file1; char buffer[512]; char c; file1.open("66666.txt", ios::in); file1.seekg(0, ios::end); string::size_type file_size = file1.tellg(); cout<<file_size<<endl; file1.seekg(0, ios::beg); for(;;){ file1...
voidlistStudents() { student st; ifstream inFile(filename, ios::binary);if(!inFile) { cout<<"File could not be open !! Press any Key..."; getch();return; }while(inFile.read((char*) &st,sizeof(student))) { cout << setw(10) << st.retstudnum() << setw(30) << st.getfir...
int Write_File(user& obj) { fstreamfio; fio.open("C://test/Register.txt",ios::in|ios::out|ios::binary); //打开文件 读/写/二进制 if (!fio) //如果打开失败 则提示出错并退出程序 { cout << " Open File Failed!" << endl; ...
#include<fstream> #include<string> intmain(){ std::ifstreamfile("example.txt");// 打开文件 if(file.is_open()) { std::stringbuffer(100,'\0');// 创建缓冲区 file.read(buffer.data(), buffer.size());// 从文件中读取数据到缓冲区 std::cout << buffer << std::endl;// 输出缓冲区内...
// employee.bin is a new file that I will be writing to and then reading from // Write all employee's currently in the vector to the file fstream emprecs("employee.bin", ios::in | ios::out | ios::binary | ios::trunc); _ASSERT(emprecs.is_open()); for (size_t i = 0; i...