79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
// vect2.cpp -- methods and iterators
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#include <iostream>
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#include <string>
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#include <vector>
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struct Review {
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std::string title;
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int rating;
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};
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bool FillReview(Review & rr);
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void ShowReview(const Review & rr);
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int main()
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{
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using std::cout;
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using std::vector;
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vector<Review> books;
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Review temp;
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while (FillReview(temp))
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books.push_back(temp);
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int num = books.size();
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if (num > 0)
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{
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cout << "Thank you. You entered the following:\n"
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<< "Rating\tBook\n";
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for (int i = 0; i < num; i++)
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ShowReview(books[i]);
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cout << "Reprising:\n"
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<< "Rating\tBook\n";
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vector<Review>::iterator pr;
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for (pr = books.begin(); pr != books.end(); pr++)
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ShowReview(*pr);
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vector <Review> oldlist(books); // copy constructor used
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if (num > 3)
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{
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// remove 2 items
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books.erase(books.begin() + 1, books.begin() + 3);
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cout << "After erasure:\n";
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for (pr = books.begin(); pr != books.end(); pr++)
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ShowReview(*pr);
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// insert 1 item
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books.insert(books.begin(), oldlist.begin() + 1,
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oldlist.begin() + 2);
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cout << "After insertion:\n";
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for (pr = books.begin(); pr != books.end(); pr++)
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ShowReview(*pr);
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}
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books.swap(oldlist);
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cout << "Swapping oldlist with books:\n";
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for (pr = books.begin(); pr != books.end(); pr++)
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ShowReview(*pr);
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}
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else
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cout << "Nothing entered, nothing gained.\n";
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// std::cin.get();
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return 0;
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}
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bool FillReview(Review & rr)
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{
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std::cout << "Enter book title (quit to quit): ";
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std::getline(std::cin,rr.title);
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if (rr.title == "quit")
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return false;
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std::cout << "Enter book rating: ";
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std::cin >> rr.rating;
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if (!std::cin)
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return false;
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// get rid of rest of input line
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while (std::cin.get() != '\n')
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continue;
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return true;
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}
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void ShowReview(const Review & rr)
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{
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std::cout << rr.rating << "\t" << rr.title << std::endl;
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}
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