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  1. #include <iostream>
  2. #include <fstream>
  3. #include <string>
  4.  
  5. struct Applicant {
  6.     std::string lastName;
  7.     int course;
  8.     std::string group;
  9.     double averageScore;
  10. };
  11.  
  12. void writeToFile(const std::string& filename) {
  13.     std::ofstream file(filename);
  14.  
  15.     if (!file) {
  16.         std::cerr << "Error opening file for writing";
  17.         return;
  18.     }
  19.  
  20.     int numApplicants;
  21.     std::cout << "Enter the number of applicants: ";
  22.     std::cin >> numApplicants;
  23.  
  24.     for (int i = 0; i < numApplicants; ++i) {
  25.         Applicant app;
  26.         std::cout << "Enter last name, course, group and average score for applicant " << i+1 << ": ";
  27.         std::cin >> app.lastName >> app.course >> app.group >> app.averageScore;
  28.         file << app.lastName << " " << app.course << " " << app.group << " " << app.averageScore << std::endl;
  29.     }
  30.  
  31.     file.close();
  32. }
  33.  
  34. void readFromFile(const std::string& filename) {
  35.     std::ifstream file(filename);
  36.  
  37.     if (!file) {
  38.         std::cerr << "Error opening file for reading";
  39.         return;
  40.     }
  41.  
  42.     std::cout << "List of applicants:" << std::endl;
  43.     Applicant app;
  44.     while(file >> app.lastName >> app.course >> app.group >> app.averageScore) {
  45.         std::cout << app.lastName << " " << app.course << " " << app.group << " " << app.averageScore << std::endl;
  46.     }
  47.  
  48.     file.close();
  49. }
  50.  
  51. int main() {
  52.     const std::string filename = "applicants.txt";
  53.  
  54.     writeToFile(filename);
  55.     readFromFile(filename);
  56.  
  57.     return 0;
  58. }
  59.  
Success #stdin #stdout #stderr 0s 5280KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Error opening file for writingError opening file for reading
https://ideone.com/Ylbx8b
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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