chore: Add course material

397/SolutionEx33/main.cpp

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+
+#include "Pixel.h"
+
+#include <algorithm>
+#include <iostream>
+#include <map>
+#include <set>
+#include <vector>
+
+void pixelPrint(const Pixel &pixel) { pixel.print(); }
+
+void pixelPtrPrint(const Pixel *pixel) { pixel->print(); }
+
+int main() {
+    using namespace std;
+
+    // from Exercise 3.1
+    Pixel pixel0;
+    cout << "Ex 3.1:" << endl;
+    pixel0.print();
+    cout << endl;
+    Pixel pixel1(1, 2);
+    Pixel pixel2(3, 3);
+    Pixel pixel3(2, 4);
+    Pixel pixel4(5, 2);
+    Pixel pixel5(4, 2);
+    vector<Pixel> pixelVec;
+    pixelVec.push_back(pixel1);
+    pixelVec.push_back(pixel2);
+    pixelVec.push_back(pixel3);
+    pixelVec.push_back(pixel4);
+    pixelVec.push_back(pixel5);
+    for (unsigned int i = 0; i < pixelVec.size(); ++i) {
+        pixelVec[i].print();
+    }
+    cout << endl;
+    for (vector<Pixel>::iterator iter = pixelVec.begin(); iter != pixelVec.end(); ++iter) {
+        iter->print();
+    }
+    cout << endl;
+    for (vector<Pixel>::reverse_iterator r_iter = pixelVec.rbegin(); r_iter != pixelVec.rend(); ++r_iter) {
+        r_iter->print();
+    }
+    cout << endl;
+    for_each(pixelVec.begin(), pixelVec.end(), pixelPrint);
+    cout << endl;
+    sort(pixelVec.begin(), pixelVec.end());
+    for_each(pixelVec.begin(), pixelVec.end(), pixelPrint);
+    cout << endl;
+
+    // from Exercise 3.2
+    cout << "Ex 3.2:" << endl;
+
+    vector<Pixel *> pixelPtrVec;
+    pixelPtrVec.push_back(&pixel1);
+    pixelPtrVec.push_back(&pixel2);
+    pixelPtrVec.push_back(&pixel3);
+    pixelPtrVec.push_back(&pixel4);
+    pixelPtrVec.push_back(&pixel5);
+
+    for_each(pixelPtrVec.begin(), pixelPtrVec.end(), pixelPtrPrint);
+    cout << endl;
+    PixelPtrCompare pixelPtrComp;
+    sort(pixelPtrVec.begin(), pixelPtrVec.end(), pixelPtrComp);
+    for_each(pixelPtrVec.begin(), pixelPtrVec.end(), pixelPtrPrint);
+    cout << endl;
+    pixelPtrComp.setSortOnY(true);
+    sort(pixelPtrVec.begin(), pixelPtrVec.end(), pixelPtrComp);
+    for_each(pixelPtrVec.begin(), pixelPtrVec.end(), pixelPtrPrint);
+    cout << endl;
+
+    cout << endl;
+
+    // Ex 3.3
+    cout << "3.3 Part 1:" << endl;
+
+    set<Pixel> pixelSet;
+
+    pixelSet.insert(Pixel(1, 7));
+    pixelSet.insert(Pixel(3, 7));
+    pixelSet.insert(Pixel(2, 7));
+    cout << "There are " << pixelSet.size() << " elements in pixelSet" << endl;
+    for_each(pixelSet.begin(), pixelSet.end(), &pixelPrint);
+    cout << endl;
+
+    pixelSet.insert(Pixel(1, 7));
+    cout << "There are " << pixelSet.size() << " elements in pixelSet" << endl;
+
+    multiset<Pixel> pixelMultiset;
+    pixelMultiset.insert(Pixel(1));
+    pixelMultiset.insert(Pixel(3));
+    pixelMultiset.insert(Pixel(2));
+    cout << "There are " << pixelMultiset.size() << " elements in pixelMultiset" << endl;
+    for_each(pixelMultiset.begin(), pixelMultiset.end(), &pixelPrint);
+    cout << endl;
+
+    pixelMultiset.insert(Pixel(1));
+    cout << "There are " << pixelMultiset.size() << " elements in pixelMultiset" << endl;
+
+    cout << "3.3 Part 2:" << endl;
+    typedef map<int, Pixel> IPixelMap;
+    IPixelMap pixelMap;
+    pixelMap.insert(std::make_pair(1, Pixel(1)));
+    pixelMap.insert(std::make_pair(2, Pixel(2)));
+    pixelMap.insert(std::make_pair(2, Pixel(3)));
+
+    cout << "There are " << pixelMap.size() << " elements in pixelMap" << endl;
+
+    IPixelMap::iterator found_it = pixelMap.find(1);
+    if (found_it != pixelMap.end()) {
+        cout << "found ";
+        found_it->second.print();
+        cout << endl;
+    } else {
+        cout << "not found" << endl;
+    }
+
+    found_it = pixelMap.find(4);
+    if (found_it != pixelMap.end()) {
+        cout << "found ";
+        found_it->second.print();
+        cout << endl;
+    } else {
+        cout << "not found" << endl;
+    }
+
+    cout << "pixelMap[1] ";
+    pixelMap[1].print();
+    cout << endl;
+    cout << "pixelMap[4] ";
+    pixelMap[4].print();
+    cout << endl << endl;
+
+    typedef multimap<int, Pixel> IPixelMultiMap;
+    IPixelMultiMap pixelMultimap;
+
+    pixelMultimap.insert(std::make_pair(1, Pixel(1)));
+    pixelMultimap.insert(std::make_pair(2, Pixel(2)));
+    pixelMultimap.insert(std::make_pair(2, Pixel(3)));
+
+    cout << "There are " << pixelMultimap.size() << " elements in pixelMultimap" << endl;
+
+    cout << endl;
+
+    return 0;
+}