add math fuction

bin/examples/math/main.cpp

@@ -11,6 +11,11 @@ auto main(int argc, char *argv[]) -> int
   hack::log()(hack::math::min(4, 5));
   hack::log()(hack::math::min(c, b));
 
+  int a1 = -4, b1 = -5; 
+  hack::log()(hack::math::max_abs(a1, b1));
+
+  // 1, 2, 3, 4, 5
+  hack::log()(hack::math::sum_arithmetic_progression(1, 1, 5));
   return 0;
 }
 

bin/meson.build

@@ -2,10 +2,10 @@ executable(
   meson.project_name(), 
   # 'examples/audio/main.cpp', 
   # 'examples/concepts/main.cpp', 
-  # 'examples/math/main.cpp', 
+  'examples/math/main.cpp', 
   # 'examples/range/main.cpp', 
   # 'examples/patterns/main.cpp', 
-  'examples/logger/main.cpp', 
+  # 'examples/logger/main.cpp', 
   # 'examples/exception/main.cpp', 
   # 'examples/comparators/main.cpp', 
   dependencies : deps,

run.sh

@@ -1,29 +0,0 @@
-#!/bin/zsh
-
-PROJECT_NAME=$(basename $PWD)
-
-run() {
-  command meson compile -C build 
-  cd build
-  ./bin/$PROJECT_NAME
-  cd ..
-}
-
-# run test [name_test]
-# example: run test pattrens
-if [[ "$1" == "test" ]]; then
-  echo ""
-  meson test $2 -C build 
-  echo ""
-  awk '/^-------------------------------------------------------------------------------/{flag=1}  /===============================================================================/{flag=0} flag' ./build/meson-logs/testlog.txt
-elif [[ "$1" == "tests" ]]; then
-  echo ""
-  meson test -C build 
-  echo ""
- # awk '/^-------------------------------------------------------------------------------/{flag=1}  /===============================================================================/{flag=0} flag' ./build/meson-logs/testlog.txt
-elif [[ -d "build" ]]; then
-  run
-else
-  command meson setup build
-  run
-fi

src/hack/math/math.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <type_traits>
+#include <math.h>
 
 namespace hack::math
 {
@@ -18,4 +19,26 @@ namespace hack::math
   {
     return a < b ? a : b;
   }
+
+  template<typename T, typename U, typename RT = std::common_type_t<T, U>>
+  inline RT max_abs(T a, U b)
+  {
+    return std::abs(a) > std::abs(b) ? a : b;
+  }
+
+  template<typename T, typename U, typename RT = std::common_type_t<T, U>>
+  inline RT min_abs(T a, U b)
+  {
+    return std::abs(a) < std::abs(b) ? a : b;
+  }
+
+  // Функция для вычисления суммы арифметической прогрессии
+  // a1 - первый член
+  // d - разность (шаг)
+  // n - количество членов
+  inline long long sum_arithmetic_progression(long long a1, long long d, std::size_t n) {
+    // Формула суммы: S = n * (2*a1 + (n-1)*d) / 2
+    // см. wiki/math
+    return n * (2 * a1 + (n - 1) * d) / 2;
+  }
 }