HW1 SerafimPetrenko

sum_horizontal.cpp

@@ -0,0 +1,46 @@
+#include <chrono>
+#include <iostream>
+
+class Timer
+{
+    using clock_t = std::chrono::high_resolution_clock;
+    using microseconds = std::chrono::microseconds;
+public:
+    Timer()
+        : start_(clock_t::now())
+    {
+    }
+
+    ~Timer()
+    {
+        const auto finish = clock_t::now();
+        const auto us = 
+            std::chrono::duration_cast<microseconds>
+                (finish - start_).count();
+        std::cout << us << " us" << std::endl;
+    }
+
+private:
+    const clock_t::time_point start_;
+};
+
+
+int main(){
+    int size = 100;
+    int arr[size][size];
+
+    for(int i = 0; i<size; i++)
+        for (int j = 0; j < size; j++)
+           arr[i][j] = j;
+
+    Timer t;
+
+    int sum = 0;
+
+    for (int i = 0; i < size; i++)
+        for (int j = 0; j < size; j++)
+            sum += arr[i][j];
+
+    return sum;
+}
+

sum_vertical.cpp

@@ -0,0 +1,46 @@
+#include <chrono>
+#include <iostream>
+
+class Timer
+{
+    using clock_t = std::chrono::high_resolution_clock;
+    using microseconds = std::chrono::microseconds;
+public:
+    Timer()
+        : start_(clock_t::now())
+    {
+    }
+
+    ~Timer()
+    {
+        const auto finish = clock_t::now();
+        const auto us = 
+            std::chrono::duration_cast<microseconds>
+                (finish - start_).count();
+        std::cout << us << " us" << std::endl;
+    }
+
+private:
+    const clock_t::time_point start_;
+};
+
+
+int main(){
+    int size = 10000;
+    int arr[size][size];
+
+    for(int i = 0; i<size; i++)
+        for (int j = 0; j < size; j++)
+           arr[i][j] = j;
+
+    Timer t;
+
+    int sum = 0;
+
+    for (int j = 0; j < size; j++)
+        for (int i = 0; i < size; i++)
+            sum += arr[i][j];
+
+    return sum;
+}
+