1 files changed, 0 insertions, 75 deletions
diff --git a/works/life/operating-system-experiment/ParallelCalculationDemo.cpp b/works/life/operating-system-experiment/ParallelCalculationDemo.cpp
deleted file mode 100644
index 0174c55..0000000
--- a/works/life/operating-system-experiment/ParallelCalculationDemo.cpp
+++ /dev/null
@@ -1,75 +0,0 @@
-#include "Thread.h"
-
-#include <iostream>
-
-const long long N = 1e9;
-
-int main(int argc, char **argv) {
-  int thread_number;
-  if (argc == 1) {
-    thread_number = 1;
-  } else if (argc == 2) {
-    thread_number = std::atoi(argv[1]);
-    if (thread_number <= 0) {
-      std::cerr << "Argument must be a positive integer.\n";
-      return -1;
-    }
-  } else {
-    std::cerr << "Too many arguments.\n";
-    return -1;
-  }
-
-  std::cout << "Use " << thread_number << " threads to calculate sum of 1-" << N
-            << ".\n";
-
-  if (thread_number == 1) {
-    long long sum = 0;
-    for (long long i = 1; i <= 1e9; i++) {
-      sum += i;
-    }
-    std::cout << "Sum of 1-" << N << " is " << sum << '\n';
-  } else {
-    std::vector<cru::Thread> threads(thread_number);
-    std::vector<long long> partial_sum(thread_number);
-
-    long long step = N / thread_number;
-
-    for (int i = 0; i < thread_number; i++) {
-      long long start = step * i;
-      long long end = step * (i + 1);
-
-      long long &ps = partial_sum[i];
-
-      if (i == thread_number - 1) {
-        threads[i] = cru::Thread([&ps, start] {
-          long long sum = 0;
-          for (long long j = start; j <= N; j++) {
-            sum += j;
-          }
-          ps = sum;
-        });
-      } else {
-        threads[i] = cru::Thread([&ps, start, end] {
-          long long sum = 0;
-          for (int j = start; j < end; j++) {
-            sum += j;
-          }
-          ps = sum;
-        });
-      }
-    }
-
-    for (auto &thread : threads) {
-      thread.Join();
-    }
-
-    long long sum = 0;
-    for (auto ps : partial_sum) {
-      sum += ps;
-    }
-
-    std::cout << "Sum of 1-" << N << " is " << sum << '\n';
-  }
-
-  return 0;
-}