將數據保存到txt文件中？ C++

Question

我正在創建一個程序，其中用戶輸入mcqs和選項，然後將數據保存到txt file.How我可以做到這一點，我試試，但它不工作。

#include <iostream> 
#include <fstream> 
#include <string> 
using namespace std; 
int main() 
{ 
    ofstream outputFile; 
    std::string fname; 
    cout<<"Enter file name"; 
    std::getline (std::cin,fname); 
    outputFile.open(fname+".txt"); 
    std::string name; 
    std::string mcqs; 
    int x; 
    cout<<"How many questions want \n"; 
    cin>>x; 

    for(int i=1;i<=x;i=i+1){ 
     cout<"Enter question "+i; 
     std::getline (std::cin,name); 
     outputFile << name << endl; 
     cout<<"Option A"; 
     std::getline (std::cin,mcqs); 
     outputFile << mcqs << endl; 
     cout<<"Option B"; 
     std::getline (std::cin,mcqs); 
     outputFile << mcqs << endl; 
     cout<<"Option C"; 
     std::getline (std::cin,mcqs); 
     outputFile << mcqs << endl; 
     cout<<"Option D"; 
     std::getline (std::cin,mcqs); 
     outputFile << mcqs << endl; 
    } 

    outputFile.close(); 
    cout << "Done!\n"; 
    getchar(); 
    return 0; 
} 

我想保存mcqs和選項txt file.Thanks

Answer 1

你的問題是與CIN獲得問題編號。您可以使用get_line和stringstream來讀取數字。

#include <iostream> 
#include <fstream> 
#include <sstream> 
#include <string> 
using namespace std; 
int main() 
{ 
    ofstream outputFile; 
    std::string fname; 
    std::string str; 
    stringstream ss; 
    int x; 

    cout<<"Enter file name:"; 
    std::getline (std::cin,fname); 
    outputFile.open(fname+".txt"); 

    cout<<"How many questions want \n"; 
    std::getline (std::cin,str); 
    ss << str; 
    ss >> x; 
    if (x == 0) 
     cout << "Invalid question number...!" << endl; 

    for(int i=1;i<=x;i=i+1){ 
      cout<<"Enter question " << i << ":"; 
      std::getline (std::cin,str); 
      outputFile << str << endl; 

      cout<<"Option A:"; 
      std::getline (std::cin,str); 
      outputFile << str << endl; 

      cout<<"Option B:"; 
      std::getline (std::cin,str); 
      outputFile << str << endl; 

      cout<<"Option C:"; 
      std::getline (std::cin,str); 
      outputFile << str << endl; 

      cout<<"Option D:"; 
      std::getline (std::cin,str); 
      outputFile << str << endl; 
    } 

    outputFile.close(); 
    cout << "Done!\n"; 
    getchar(); 
    return 0; 
} 

Answer 2

請確保包含在頂部和ofstream是名稱空間標準的成員。