sorting and PLF example 2 with modern form.

a lot of C# to be real!

PLF/plf/bsp2_modern.cpp

@@ -0,0 +1,91 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <numeric> 
+#include <algorithm>
+#include <iomanip>   
+
+using namespace std;
+
+void add_mountain(vector<string>& names, vector<int>& heights) {
+    cout << "Name des Berges: ";
+    string name;
+    getline(cin >> ws, name);
+
+    // Check if already exists
+    if (find(names.begin(), names.end(), name) != names.end()) {
+        cout << "Schon vorhanden." << endl;
+        return;
+    }
+
+    cout << "Höhe: ";
+    int height;
+    if (!(cin >> height)) {
+        cout << "Ungültige Eingabe! Bitte eine Zahl angeben." << endl;
+        cin.clear();
+        cin.ignore(numeric_limits<streamsize>::max(), '\n');
+        return;
+    }
+
+    names.push_back(name);
+    heights.push_back(height);
+    cout << "'" << name << "' mit " << height << " m wurde hinzugefügt." << endl;
+}
+
+void display_mountains(const vector<string>& names, const vector<int>& heights) {
+    cout << "\nBergliste:\n";
+    for (size_t i = 0; i < names.size(); ++i) {
+        cout << "  • " << names[i] << ": " << heights[i] << " m\n";
+    }
+}
+
+pair<string, int> get_highest_mountain(const vector<string>& names, const vector<int>& heights) {
+    auto it = max_element(heights.begin(), heights.end());
+    size_t index = distance(heights.begin(), it);
+    return { names[index], *it };
+}
+
+double calculate_average_height(const vector<int>& heights) {
+    double sum = accumulate(heights.begin(), heights.end(), 0);
+    return sum / heights.size();
+}
+
+int count_3000ers(const vector<int>& heights) {
+    return count_if(heights.begin(), heights.end(), [](int h) { return h >= 3000; });
+}
+
+int main() {
+    cout << "Berge Österreich" << endl;
+
+    vector<string> mountain_names = { "Großglockner", "Wildspitze", "Weißkugel", "Großvenediger" };
+    vector<int> mountain_heights = { 3798, 3768, 3738, 3657 };
+
+    while (true) {
+        cout << "Neue Eingabe (j/n)? ";
+        string choice;
+        cin >> choice;
+
+        if (choice == "j" || choice == "J") {
+            add_mountain(mountain_names, mountain_heights);
+        } else if (choice == "n" || choice == "N") {
+            break;
+        } else {
+            cout << "Bitte nur 'j' oder 'n' eingeben." << endl;
+        }
+    }
+
+    display_mountains(mountain_names, mountain_heights);
+
+    auto [highest_name, highest_height] = get_highest_mountain(mountain_names, mountain_heights);
+    cout << "\nDer höchste Berg ist der " << highest_name
+         << " mit " << highest_height << " m.\n";
+
+    cout << fixed << setprecision(1);
+    double avg_height = calculate_average_height(mountain_heights);
+    cout << "Die durchschnittliche Höhe beträgt " << avg_height << " m.\n";
+
+    int count = count_3000ers(mountain_heights);
+    cout << "In der Liste sind " << count << " 3000er gespeichert.\n";
+
+    return 0;
+}