[3sem] dsaa05 with protecc and report

3sem/data structures and algos/05/program.cpp

@@ -0,0 +1,96 @@
+// dsaa_05.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <vector>
+#include <chrono>
+#include <cmath>
+#include <cassert>
+#include <algorithm>
+
+
+inline void time_passed(std::chrono::system_clock::time_point start, double &holder) {
+    auto stop = std::chrono::high_resolution_clock::now();
+    auto duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
+    holder = duration.count();
+}
+
+typedef double num_type;
+typedef std::vector<num_type> num_list;
+
+void test();
+void algo_01(num_list &cont);  // Stupid sort
+void algo_02(num_list &cont);  // Shell sort
+
+
+int main() {
+    test();
+
+    return 0;
+}
+
+void test() {
+    int n;
+    std::cout << "Count of items:\n";
+    std::cin >> n;
+    num_list data;
+    data.reserve(n);
+    for (int i = 0; i < n; i++) {
+        int d;
+        std::cin >> d;
+        data.push_back(d);
+    }
+
+
+    num_list copy_1(data);
+    num_list copy_2(data);
+
+    double fft, sft = fft = 0;
+
+    {
+        auto start = std::chrono::high_resolution_clock::now();
+        algo_01(copy_1);
+        time_passed(start, fft);
+    }
+    {
+        auto start = std::chrono::high_resolution_clock::now();
+        algo_02(copy_2);
+        time_passed(start, sft);
+    }
+    {
+        assert(copy_1 == copy_2);
+    }
+
+    printf(
+            "algo_01 (%.0f) is %s than algo_02 (%.0f) by %.0f microseconds\n",
+            fft, (fft > sft? "slower" : "faster"), sft, fabs(fft - sft)
+    );
+}
+
+void algo_01(num_list &cont) {  // Stupid sort
+    auto vit_b = cont.begin() + 1;
+
+    while (vit_b != cont.end()) {
+        auto vit_p = vit_b - 1;
+        if (*vit_p > *vit_b) {
+            std::swap(*vit_p, *vit_b);
+            vit_b = cont.begin() + 1;
+        }
+        else {
+            vit_b += 1;
+        }
+    }
+}
+
+void algo_02(num_list &cont) {  // Shell sort
+    auto vit_first = cont.begin();
+    auto vit_last = cont.end();
+    for(auto d = (vit_last - vit_first) / 2; d != 0; d /= 2) {
+        for(auto i = vit_first + d; i != vit_last; ++i) {
+            for(auto j = i; j - vit_first >= d; j -= d) {
+                if (*j < *(j - d)) {
+                    std::swap( *j, *( j - d ) );
+                }
+            }
+        }
+    }
+}