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1sem/programming basics/z9/25.cpp

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+// pb_z9_25.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <cstdlib>
+
+using namespace std;
+
+void sort(double arr[], int len, bool asc);
+void print_array(const double *arr, size_t len);
+double *get_array(size_t len);
+int comp_asc(const void* a, const void* b);
+int comp_desc(const void* a, const void* b);
+
+// 10 1 2 3 5 4 3 2 2 9 1 0
+int main() {
+    size_t len;
+    cout << "Array length >>>";
+    cin >> len;
+    cout << "Enter array elements >>>";
+    double *a = get_array(len);
+    bool asc;
+    cout << "Ascending sort? (1/0) >>>";
+    cin >> asc;
+    cout << "Array before: ";
+    print_array(a, len);
+    sort(a, len, asc);
+    cout << "Array after: ";
+    print_array(a, len);
+}
+
+void sort(double arr[], int len, bool asc) {
+    qsort(arr, len, sizeof(double), asc? comp_asc : comp_desc);
+}
+
+void print_array(const double *arr, size_t len) {
+    for (size_t i = 0; i < len; i++) {
+        cout << *(arr + i) << " ";
+    }
+    cout << endl;
+}
+
+double *get_array(size_t len) {
+    auto *a = new double[len];
+    for (size_t i = 0; i < len; i++) {
+        cin >> *(a + i);
+    }
+    return a;
+}
+
+int comp_asc(const void* a, const void* b) {
+    double arg1 = *(const double*)(a);
+    double arg2 = *(const double*)(b);
+
+    if(arg1 < arg2) return -1;
+    if(arg1 > arg2) return 1;
+    return 0;
+}
+
+int comp_desc(const void* a, const void* b) {
+    double arg1 = *(const double*)(a);
+    double arg2 = *(const double*)(b);
+
+    if(arg1 < arg2) return 1;
+    if(arg1 > arg2) return -1;
+    return 0;
+}