【题目】ifstream的用法#includefstream.h#includeiostream.h //usingnamespacestd; staticcharch; main() { ifstreaminfile(filename,ios::in); if(!infile) { cout"openerror!"endl; exit(1); } infile.get(ch); cout.put(ch); coutendl;system("pause");}为何我这样写的时候程序说ifstream没有定义呢...
1ifstream inFile(filename, ios::in);23if(!inFile.is_open())4{5return;6}
// 打开文件,获得文件流 std::ifstream inFile(fileName.c_str(), std::ios::in | std::ios::binary); std::ostringstream oss; oss << inFile.rdbuf(); std::string buffer = oss.str(); inFile.close();
infile.close(); 在读取完文件数据后,应该使用close()函数来关闭文件。 完整示例: cpp #include <iostream> #include <fstream> #include <string> int main() { std::ifstream infile; infile.open("filename.txt"); if (infile.is_open()) { std::string line; while (std::getline(infile, line))...
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...
<fstream> include <string> using namespace std;static char ch;main(){ ifstream infile(filename,ios::in);if(!infile){ cout<<"open error!"<<endl;exit(1);} infile.get(ch);cout.put(ch);cout<<endl;system("pause");} 这个你在把filename改成一个具体的文件名就行了...
usingnamespacestd; intmain() { stringfileName;//读取文件名 cout<<"Enter file name: "<<endl; cin>>fileName; ifstreaminFile(fileName.c_str());//创建ifstream对象并绑定到名为fileName的文件 if(!inFile)//打开指定文件失败 { cerr<<"error: can not open input file: " ...
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<&
using namespace std; int _tmain(int argc, _TCHAR* argv[]) { ifstream infile("d://测试.txt"); if(infile.is_open()) { cout<<"Open Success!"; } else { cout<<"Open Fail!"; } return 0; } (3)运行结果:输出“Open Fail” (打开文件失败!) ...
ifstream infile(strFileName,ios::in);//首先定义一个ifstream 对象,strFileName为操作文件地址名. if(!infile) return; char szTemp[1000]; //定义一个缓冲字符数组 int nLength; while(infile.getline(szTemp,1000)) { nLength=lstrlen(szTemp); ///测试代码/// CString nindex; nindex....