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  1. #include "../Headers/std_lib_facilities.h"
  2.  
  3. struct Item
  4. {
  5.     string name;
  6.     int iid;
  7.     double value;
  8.     /* . . . */
  9. };
  10.  
  11. // how come this operator works, and I haven't addressed '\n' explicitly?
  12.  
  13. istream& operator >> (istream& is, Item& item)
  14. {
  15.     string name;
  16.     int iid;
  17.     double value;
  18.     char ch1;
  19.     char ch2;
  20.     is >> ch1;
  21.     if (ch1 != '{')
  22.     {
  23.         error("Bad formmatting");
  24.     }
  25.     is >> name;
  26.     is >> iid;
  27.     is >> value;
  28.     is >> ch2;
  29.     if (ch2 != '}')
  30.     {
  31.         error("Bad formmatting");
  32.     }
  33.     item.name = name;
  34.     item.iid = iid;
  35.     item.value = value;
  36. }
  37.  
  38. void printVector(const vector<Item>& arg)
  39. {
  40.     for (int i = 0; i < arg.size(); i++)
  41.     {
  42.         cout << arg[i].name << " " << arg[i].iid << " " << arg[i].value << endl;
  43.     }
  44. }
  45.  
  46. int main()
  47. {
  48.     // 1. Define a struct Item { string name; int iid; double value; /* . . . */ };, make a vector<Item>, vi, and fill it
  49.     // with ten items from a file.
  50.     ifstream is{"Drills.txt"};
  51.     vector<Item> items;
  52.     for (int i = 0; i < 10; i++)
  53.     {
  54.         Item temp;
  55.         is >> temp;
  56.         items.push_back(temp);
  57.     }
  58.     // 2. Sort vi by name.
  59.     sort(items.begin(), items.end(), [](const Item& item1, const Item& item2) {return item1.name < item2.name; });
  60.     printVector(items);
  61.     cout << "--------------------------------------------------" << endl;
  62.     // 3. Sort vi by iid.
  63.     sort(items.begin(), items.end(), [](const Item& item1, const Item& item2) {return item1.iid < item2.iid; });
  64.     printVector(items);
  65.     cout << "--------------------------------------------------" << endl;
  66.     // 4. Sort vi by value; print it in order of decreasing value (i.e., largest value first).
  67.     sort(items.begin(), items.end(), [](const Item& item1, const Item& item2) {return item1.value > item2.value; });
  68.     printVector(items);
  69.     cout << "--------------------------------------------------" << endl;
  70.     // 5. Insert Item('horse shoe',99,12.34) and Item('Canon S400', 9988,499.95).
  71.     items.push_back(Item{"horse shoe", 99, 12.34});
  72.     items.push_back(Item{"Canon S400", 9988, 499.95});
  73.     // 6. Remove (erase) two Items identified by name from vi.
  74.     string firstName, secondName;
  75.     cin >> firstName >> secondName;
  76.     for (auto it = items.begin(); it != items.end(); it++)
  77.     {
  78.         if ((it->name == firstName) || (it->name == secondName))
  79.         {
  80.             items.erase(it);
  81.         }
  82.     }
  83.     printVector(items);
  84.     cout << "--------------------------------------------------" << endl;
  85.     // 7. Remove (erase) two Items identified by iid from vi.
  86.     int iid1, iid2;
  87.     cin >> iid1 >> iid2;
  88.     for (auto it = items.begin(); it != items.end(); it++)
  89.     {
  90.         if ((it->iid == iid1) || (it->iid == iid2))
  91.         {
  92.             items.erase(it);
  93.         }
  94.     }
  95.     printVector(items);
  96. }
  97.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp:1:43: fatal error: ../Headers/std_lib_facilities.h: No such file or directory
 #include "../Headers/std_lib_facilities.h"
                                           ^
compilation terminated.
stdout 
Standard output is empty
https://ideone.com/KaTWQV
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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