Recitation for SZE OODB course - Hajdu Csaba

.gitignore

@@ -26,3 +26,24 @@
 *.exe
 *.out
 *.app
+*.filters
+*.user
+*.log
+*.pdb
+*.idb
+*.tlog
+*.ilk
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/.suo
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/Browse.VC.db
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/Browse.VC.opendb
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/720e8647fbac6ed7.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/AutoPCH/6bfa9ec59ac6f7db/LINKEDLIST.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/AutoPCH/abb60791adcf511b/LABIRINTUS.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/AutoPCH/cdab13bb4a56a2ec/UNIT.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/AutoPCH/cea2f45df4cc64ab/SPHERECALCULATION.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/AutoPCH/dee12e2fe46a3cab/BOOKOPERATOROVERLOADING.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/AutoPCH/e7590d024f13c469/MAIN.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/ipch/f1b21f5d4784671e.ipch
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/Solution.VC.db
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/Solution.VC.db-shm
+SZE/OODB/kyberszittya/Rec3/Recitation3/.vs/Recitation3/v15/Solution.VC.db-wal

SZE/OODB/kyberszittya/Rec1/.gitignore

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+.vscode/

SZE/OODB/kyberszittya/Rec1/CMakeLists.txt.in

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+cmake_minimum_required(VERSION 2.8.2)
+
+project(googletest-download NONE)
+
+include(ExternalProject)
+ExternalProject_Add(googletest
+  GIT_REPOSITORY    https://github.com/google/googletest.git
+  GIT_TAG           master
+  SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-src"
+  BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-build"
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND     ""
+  INSTALL_COMMAND   ""
+  TEST_COMMAND      ""
+)

SZE/OODB/kyberszittya/Rec1/easy/comp_interest/.gitignore

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+build/

SZE/OODB/kyberszittya/Rec1/easy/comp_interest/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+project(CompoundInterest)
+
+add_executable(CompoundInterest src/main.cpp)
+add_executable(CompoundInterestFile src/main_file.cpp)

SZE/OODB/kyberszittya/Rec1/easy/comp_interest/data/interests.dat

@@ -0,0 +1,4 @@
+50 7.7 90
+666 8 1000
+700 5 1500
+40 10 230

SZE/OODB/kyberszittya/Rec1/easy/comp_interest/src/comp_interest.h

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+#include <cmath>
+
+const inline double yearsToTargetCash(const double& cash, const double& interest, const double& target_cash)
+{
+    return std::log(target_cash/cash)/std::log(1.0+interest);
+}

SZE/OODB/kyberszittya/Rec1/easy/comp_interest/src/main.cpp

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+#include <iostream>
+
+#include "comp_interest.h"
+
+using namespace std;
+
+int main(int argc, char** argv)
+{
+    double cash, interest, target_cash;
+    cout << "Starting cash [EUR]: ";
+    cin  >> cash;
+    cout << "Compound interest [%]: ";
+    cin  >> interest;
+    interest /= 100.0;
+    cout << "Desired cash [EUR]: ";
+    cin  >> target_cash;
+    cout << "Years to get cash: " << ceil(yearsToTargetCash(cash, interest, target_cash)) << '\n';
+
+    return 0;
+}

SZE/OODB/kyberszittya/Rec1/easy/comp_interest/src/main_file.cpp

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+#include <iostream>
+#include <fstream>
+#include <sstream>
+
+#include "comp_interest.h"
+
+
+using namespace std;
+
+
+int main(int argc, char** argv)
+{
+    ifstream file("../data/interests.dat");
+    if (file.is_open())
+    {
+        string line;
+        while(getline(file, line))
+        {
+            stringstream ss(line);
+            double cash, interest, target_cash;
+            ss   >> cash;
+            ss   >> interest;
+            interest /= 100.0;
+            ss   >> target_cash;
+            cout << "Starting cash [EUR]: " << cash << '\n';
+            cout << "Compound interest [%]: " << interest << '\n';
+            cout << "Desired cash [EUR]: " << target_cash << '\n';
+            cout << "Years to get cash: " << ceil(yearsToTargetCash(cash, interest, target_cash)) << '\n';
+            cout << '\n';
+        }
+    }
+    return 0;
+}

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/.gitignore

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+build/

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+project(TriangleCalc)
+
+add_executable(TriangleAreaCalc src/main.cpp src/triangle.cpp)
+add_executable(TriangleAreaCalcFile src/main_file.cpp src/triangle.cpp)
+
+# If you want to test, then go ahead with it
+configure_file(./../../CMakeLists.txt.in googletest-download/CMakeLists.txt)
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
+if(result)
+  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
+endif()
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+  RESULT_VARIABLE result
+  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
+if(result)
+  message(FATAL_ERROR "Build step for googletest failed: ${result}")
+endif()
+add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src
+    ${CMAKE_CURRENT_BINARY_DIR}/googletest-build
+    EXCLUDE_FROM_ALL)
+
+set(PROJECT_TEST_NAME ${PROJECT_NAME}_test)
+include_directories(${GTEST_INCLUDE_DIRS})
+add_executable(${PROJECT_TEST_NAME} test/test_triangle.cpp src/triangle.cpp)
+
+
+target_link_libraries(${PROJECT_TEST_NAME} gtest_main pthread)

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/data/triangles.dat

@@ -0,0 +1,5 @@
+3 4 5
+15 16 19
+6 4 7
+5 6 2
+4 7 19

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/src/main.cpp

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+
+#include <iostream>
+
+#include "triangle.h"
+
+
+int main(int argc, char** argv)
+{
+    double a,b,c;
+    std::cout << "Give me some traingle parameters" << '\n';
+    std::cout << "Side a [cm]: ";
+    std::cin  >> a;
+    std::cout << "Side b [cm]: ";
+    std::cin  >> b;
+    std::cout << "Side c [cm]: ";
+    std::cin  >> c;
+    Triangle triangle({a,b,c});
+    if (validTriangle(triangle))
+    {
+        std::cout << "Area [cm^2]: " << calcTriangleArea(triangle) << '\n';
+    }
+    else
+    {
+        std::cerr << "Invalid triangle\n";
+    }
+
+    return 0;
+}

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/src/main_file.cpp

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+#include <iostream>
+#include <fstream>
+#include <sstream>
+
+#include "triangle.h"
+
+int main(int argc, char** argv)
+{
+    std::ifstream triangle_input_file(argv[1]);
+    if (triangle_input_file.is_open())
+    {
+        std::string line;
+        while(getline(triangle_input_file, line))
+        {
+            std::stringstream ss(line);
+            double a,b,c;
+            ss        >> a;
+            ss        >> b;
+            ss        >> c;
+            std::cout << "Sides [cm]: " << a << '\t' << b << '\t' << c << '\n';
+            Triangle triangle({a,b,c});
+            if (validTriangle(triangle))
+            {
+                std::cout << "Area [cm^2]: " << calcTriangleArea(triangle) << '\n';
+            }
+            else
+            {
+                std::cerr << "Invalid triangle\n";
+            }
+        }
+    }
+
+
+    return 0;
+}

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/src/triangle.cpp

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+#include "triangle.h"
+
+
+inline double calcSemiperimeter(const Triangle& triangle)
+{
+    return (triangle.a+triangle.b+triangle.c)/2.0;
+}
+
+/**
+ * Check if triangle is correct using triangle equations
+ * */
+bool validTriangle(const Triangle& triangle)
+{
+    if (std::abs(triangle.a - triangle.b) < triangle.c && triangle.c < triangle.a + triangle.b)
+    {
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+
+}
+
+/**
+ * Use Heron's formula. It's cool.
+ * A = sqrt()
+ * */
+double calcTriangleArea(const Triangle& triangle)
+{
+    double s = calcSemiperimeter(triangle);
+    return std::sqrt(s*(s-triangle.a)*(s-triangle.b)*(s-triangle.c));
+}

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/src/triangle.h

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+#include <cmath>
+
+struct Triangle
+{
+    double a,b,c;
+};
+
+inline double calcSemiperimeter(const Triangle& triangle);
+bool validTriangle(const Triangle& triangle);
+double calcTriangleArea(const Triangle& triangle);

SZE/OODB/kyberszittya/Rec1/easy/triangle_area_calculator/test/test_triangle.cpp

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+#include "../src/triangle.h"
+
+#include "gtest/gtest.h"
+
+TEST(TriangleTestSuite, triangleEquationCorrect1)
+{
+    Triangle triangle({3,4,5});
+    ASSERT_TRUE(validTriangle(triangle));
+}
+
+TEST(TriangleTestSuite, triangleEquationCorrect2)
+{
+    Triangle triangle({13,12,17});
+    ASSERT_TRUE(validTriangle(triangle));
+}
+
+TEST(TriangleTestSuite, triangleEquationIncorrect1)
+{
+    Triangle triangle({13,12,34});
+    ASSERT_FALSE(validTriangle(triangle));
+}
+
+TEST(TriangleTestSuite, triangleArea)
+{
+    Triangle triangle({3,4,5});
+    ASSERT_DOUBLE_EQ(6.0, calcTriangleArea(triangle));
+}
+
+int main(int argc, char** argv)
+{
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}

SZE/OODB/kyberszittya/Rec1/hard/simple_temp_monitor_memory/.gitignore

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+build/

SZE/OODB/kyberszittya/Rec1/hard/simple_temp_monitor_memory/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+project(SimpleTempMonitorMemory)
+
+add_executable(SimpleTempMonitorMemory src/main.cpp)

SZE/OODB/kyberszittya/Rec1/hard/simple_temp_monitor_memory/Readme.md

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+# Build with CMake
+Create a folder:
+```bash
+mkdir build && cd build
+cmake ..
+make
+```
+Then run:
+```bash
+./SimpleTempMonitorMemory
+```
+
+# Debug
+To debug with cmake, run the following:
+```bash
+mkdir build && cd build
+cmake .. -DCMAKE_BUILD_TYPE=Debug
+make
+```
+Then, you can use a debugger (gdb):
+```
+gdb ./SimpleTempMonitorMemory
+```
+
+To check memory leaks with Valgrind, use the following:
+```
+valgrind --leak-check=yes ./SimpleTempMonitorMemory
+```