C++ 通过以下几个类支持文件的输入输出： ofstream: 写操作（输出）的文件类 (由ostream引申而来) ifst...
看: #include #include #include using namespace std;int main(){ ifstream in...这是你第一次使用 **Markdown编辑器** 所展示的欢迎页。如果你想学习如何使用Markdown编辑器, 可以仔细阅读这篇文章,了解一下Markdown的基本语...
std::ifstream comport; std::string linein; std::ios_base::iostate exceptionMask = comport.exceptions() | std::ios::failbit; comport.exceptions(exceptionMask); try { comport.open("COM6:", std::ifstream::in); } catch (std::ios_base::failure &e) { std::string erroropen( e.what...
int main(){ifstream fin("1.txt",ios::in|ios::out|ios::app);while (fin)//直接对象名即可{int a;char str[10];fin >> a;fin >> str;cout << a << "+char" << str << endl;}return 0;}
if(!in1||!in2){ cout<<"wrong"<<endl; return 0; } unordered_map<string,string> transword; for(string key,value;in1>>key && getline(in1,value);){ if (value.size()>1) transword[key]=value.substr(1); } for(string text,word;getline(in2,text);){ ...
ifstream的用法#include<fstream.h> #include<iostream.h> //usingnamespacestd; staticcharch; main() { ifstreaminfile(filename,ios::in); if(!infile) { cout<<"openerror!"<<endl; exit(1); } infile.get(ch); cout.put(ch); cout<&
ifstream的用法#include<fstream.h> #include<iostream.h> //usingnamespacestd; staticcharch; main() { ifstreaminfile(filename,ios::in); if(!infile) { cout<<"openerror!"<<endl; exit(1); } infile.get(ch); cout.put(ch); cout<<endl; system("pause"); } 为何我这样写的时候程序说...
=std::ios_base::in); (2) explicitbasic_ifstream(conststd::filesystem::path::value_type*filename, std::ios_base::openmodemode =std::ios_base::in); (3)(since C++17) explicitbasic_ifstream(conststd::string&filename, std::ios_base::openmodemode ...
leichen@gpu-compute4$ make g++ -Wall -pedantic-errors -g -w -lpthread -c rainfall.cpp -o rainfall.o rainfall.cpp: In function ‘int main(int, char**)’: rainfall.cpp:50:39: error: no matching function for call to ‘std::basic_ifstream<char>...
struct Point{ string timeDate; double p; Point(string d1, double p1):timeDate(d1),p(p1){} }; int readData(const char * filename,vector<Point>& data){ ifstream ifs(filename); if(!ifs){ cout<<"file error"<<endl; return -1; ...