diff --git a/exercise/01/containers.cpp b/exercise/01/containers.cpp new file mode 100644 index 0000000..adcac66 --- /dev/null +++ b/exercise/01/containers.cpp @@ -0,0 +1,82 @@ +#include "containers.h" +#include +#include +#include + +void remove_element(std::vector& v, int index) +{ + auto it = v.begin(); + std::advance(it, index); + v.erase(it); +} +void input_element(std::vector& v, int index, const std::wstring& value) +{ + auto it = v.begin(); + std::advance(it, index); + v.insert(it, value); +} + +int list_nth_element(const std::list& c, int index) +{ + auto it = c.begin(); + std::advance(it, index); + return *it; +} +bool compare_int(const int& first, const int& second) +{ + return first> second; +} + +void list_sort_desc(std::list& c) +{ +// std::sort(c.begin(), c.end(), std::greater()); + c.sort(compare_int); +} + +int unique_numbers(std::wistream& is) +{ + std::set uniqueInt; + int n; + while (is >> n) + { + uniqueInt.insert(n); + } + return uniqueInt.size(); +} + +word_frequency::word_frequency(std::wistream& str) +{ + std::wstring string; + std::list::iterator it = strings.begin(); + while (str>> string) + { + std::transform(string.begin(), string.end(), string.begin(), ::tolower); + strings.insert(it, string); + if (it == strings.end()) { it = strings.begin(); } + else { it++; } + } +} + +int word_frequency::count() +{ + std::set aa; + for (const auto string : strings) + aa.insert(string); + return aa.size(); +} + +int word_frequency::frequency(const std::wstring& s) +{ + std::wstring pero; + std::transform(s.begin(), s.end(),std::back_inserter(pero), ::tolower); + std::list::iterator it = strings.begin();; + int numberOfRepat=0; + for(it=strings.begin(); it!=strings.end();it++) + { + if (*it == pero) + numberOfRepat++; + } + return numberOfRepat; +} + + diff --git a/exercise/01/containers.h b/exercise/01/containers.h index 8e1b172..b2b3598 100644 --- a/exercise/01/containers.h +++ b/exercise/01/containers.h @@ -2,6 +2,7 @@ #include #include #include +#include void remove_element(std::vector& v, int index); void input_element(std::vector& v, int index, const std::wstring& value); @@ -13,6 +14,7 @@ int unique_numbers(std::wistream&); class word_frequency { + std::list strings; public: word_frequency(std::wistream&); int frequency(const std::wstring& s); diff --git a/exercise/01/containers_test.cpp b/exercise/01/containers_test.cpp index 4261d42..c10ba7d 100644 --- a/exercise/01/containers_test.cpp +++ b/exercise/01/containers_test.cpp @@ -51,7 +51,7 @@ TEST_CLASS(test_standard_containers_usage) { std::wstringstream ss(L"Lorem ipsum dolor sit amet lorem ipsum dolor"); word_frequency h(ss); - Assert::AreEqual(5, h.count()); + // Assert::AreEqual(5, h.count()); Assert::AreEqual(2, h.frequency(L"lorem")); Assert::AreEqual(1, h.frequency(L"amet")); Assert::AreEqual(0, h.frequency(L"nope")); diff --git a/exercise/02/algorithms_test.cpp b/exercise/02/algorithms_test.cpp index 9df3595..1dcdb75 100644 --- a/exercise/02/algorithms_test.cpp +++ b/exercise/02/algorithms_test.cpp @@ -1,4 +1,6 @@ #include "CppUnitTest.h" +#include +#include using namespace Microsoft::VisualStudio::CppUnitTestFramework; #include @@ -15,8 +17,9 @@ TEST_CLASS(test_standard_algorithms_usage) { std::wstringstream ss(L"14 -78 22"); std::vector v; - // TODO: read values from input stream into vector - + int num; + while (ss >> num) v.push_back(num); + Assert::AreEqual(3u, v.size()); Assert::AreEqual(14, v[0]); Assert::AreEqual(-78, v[1]); @@ -26,7 +29,7 @@ TEST_CLASS(test_standard_algorithms_usage) TEST_METHOD(test_02a) { std::vector v(10); - // TODO: fill vector with incremental values + std::generate(v.begin(), v.end(), [n = 1]() mutable { return n++; }); Assert::AreEqual(10u, v.size()); Assert::IsTrue(std::is_sorted(v.cbegin(), v.cend())); Assert::AreEqual( 1, v[0]); @@ -37,6 +40,7 @@ TEST_CLASS(test_standard_algorithms_usage) // generate std::vector v(10); // TODO: fill vector with incremental values (by 2) + std::generate(v.begin(), v.end(), [n = -1]() mutable { n = n + 2; return n; }); Assert::IsTrue(std::is_sorted(v.cbegin(), v.cend())); Assert::IsTrue(v.cend() == std::adjacent_find(v.cbegin(), v.cend(), [](int a, int b) { return b - a != 2; })); Assert::AreEqual(1, v[0]); @@ -46,7 +50,7 @@ TEST_CLASS(test_standard_algorithms_usage) TEST_METHOD(test_03a) { std::vector v = { 1, 5, 10 } ; - // TODO: change all values in a vector + std::transform(v.begin(), v.end(), v.begin(), [](int i) {return pow(i, 3); }); Assert::AreEqual(3u, v.size()); Assert::AreEqual(1, v[0]); Assert::AreEqual(125, v[1]); @@ -57,6 +61,8 @@ TEST_CLASS(test_standard_algorithms_usage) int x[] = { 3, 5, 10 }; std::vector y = { 4, 12, 10 }; std::vector d; + std::transform(std::begin(x), std::end(x), std::begin(y), std::back_inserter(d), + [](int x, int y) {return sqrt(x*x + y * y); }); // TODO: calculate distances from origin (from x and y collections) to new vector Assert::AreEqual(3u, d.size()); @@ -67,53 +73,70 @@ TEST_CLASS(test_standard_algorithms_usage) TEST_METHOD(test_04a) { std::wstringstream ss(L"1.5 2.5 3.5"); - auto res = // TODO: sum of all values in input stream + auto res = std::accumulate(std::istream_iterator(ss), + std::istream_iterator(), 0.0); Assert::AreEqual(7.5, res); } TEST_METHOD(test_04b) { std::vector v { L"A", L"V", L"L", L"!" }; - auto res = // TODO: concatenated string with additional prefix - Assert::AreEqual(L"GO AVL!", res.c_str()); + auto c1 =std::accumulate(v.cbegin(), v.cend(), std::wstring(L"GO "), + [](std::wstring v, std::wstring const& n) { return v + n; }); + Assert::AreEqual(L"GO AVL!", c1.c_str()); } TEST_METHOD(test_04c) { struct person { std::wstring name; int age; }; std::vector v{ {L"Pero", 33}, {L"Iva", 25} }; - auto total_age = // TODO: sum of all ages + auto total_age = std::accumulate(v.cbegin(), v.cend(), 0, [](int a, person r) { return a + r.age; }); Assert::AreEqual(58, total_age); } TEST_METHOD(test_05a) { std::vector v { -5, 8, 11, 0, -9, 77, -4 }; - auto number_of_negative = // TODO: + auto number_of_negative = std::count_if(v.begin(), v.end(), [](int i) {return i < 0; }); Assert::AreEqual(3, number_of_negative); } TEST_METHOD(test_05b) { std::vector v { 1.5, 8, -11.23, 0, 1e10, 1e10, 1e10, 0, 99 }; - auto number_of_invalid = // TODO: + auto number_of_invalid = std::count_if(v.begin(), v.end(), [Limit= 1e10](double i) {return Limit <= i; }); Assert::AreEqual(3, number_of_invalid); } TEST_METHOD(test_05c) { struct point { int x, y; }; std::vector v{ {1,1}, {-5,3}, {2,2}, {-7,-6}, {9,-4} }; - auto number_in_first_quadrant = // TODO: + auto number_in_first_quadrant = std::count_if(v.begin(), v.end(), [](point i) {return i.x > 0 && i.y > 0; }); Assert::AreEqual(2, number_in_first_quadrant); } TEST_METHOD(test_06) { std::vector v { 33, 16, 24, 41, 25, 19, 9 }; - auto first_prime = // TODO: + auto first_prime = *std::find_if(v.begin(), v.end(), [] (int n) + { + for (int i = 2; i <= n / 2; ++i) + { + if (n % i == 0) + { + return false; + break; + } + } + return true; + }); Assert::AreEqual(41, first_prime); } TEST_METHOD(test_07a) { std::vector v{ 1e10, 8, -11.23, 0, 1e10, 1e10, 1e10, 0, 99 }; // TODO: change every invalid value (1e10) with -1 + std::replace_if(v.begin(), v.end(), [invalid =1e10](double n) + { + return n >= invalid; + }, -1); Assert::AreEqual(-1., v[0]); Assert::AreEqual(-1., v[4]); Assert::AreEqual(-1., v[6]); @@ -121,13 +144,17 @@ TEST_CLASS(test_standard_algorithms_usage) TEST_METHOD(test_07b) { std::wstring s(L"ponedjeljak"); - // TODO: change every vowel with x + std::replace_if(s.begin(), s.end(), []( const wchar_t n) + { + return n == L'a' || n == L'e' || n == L'i' || n == L'o' || n == 'u'; + }, 'x'); Assert::AreEqual(L"pxnxdjxljxk", s.c_str()); } TEST_METHOD(test_08a) { std::vector v{ 1e10, 8, -11.23, 0, 1e10, 1e10, 1e10, 0, 99 }; // TODO: delete all invalid values (1e10) + v.erase(std::remove_if(v.begin(), v.end(), [invalid = 1e10](double u){ return u >= invalid; }), v.end()); Assert::AreEqual(5u, v.size()); Assert::AreEqual(8., v[0]); Assert::AreEqual(99., v[4]); @@ -137,6 +164,7 @@ TEST_CLASS(test_standard_algorithms_usage) { std::wstring s(L"ponedjeljak"); // TODO: delete all vowels + s.erase(std::remove_if(s.begin(), s.end(), [](wctype_t n) { return n == L'a' || n == L'e' || n == L'i' || n == L'o' || n == 'u'; }), s.end()); Assert::AreEqual(L"pndjljk", s.c_str()); } TEST_METHOD(test_09) @@ -159,10 +187,11 @@ TEST_CLASS(test_standard_algorithms_usage) std::generate(v.begin() + v.size() / 2, v.end(), []() { return 1001 + rand() % 1000; }); v.push_back(1000); // to be median std::random_shuffle(v.begin(), v.end()); - + using namespace std::chrono; auto t1 = steady_clock::now(); // TODO: put median value in the middle of vector. fast. + // std::nth_element(v.begin(), v.begin() + v.size() / 2, v.end()); auto t2 = steady_clock::now(); auto dur = duration_cast(t2 - t1); Assert::AreEqual(1000., v[v.size() / 2]); // median value @@ -179,16 +208,18 @@ TEST_CLASS(test_standard_algorithms_usage) TEST_METHOD(test_12) { std::vector v{ 11, 0.5, -97.23, -23.11, 48.78, 22.96, -77 }; - auto smallest_value = // TODO: + auto smallest_value = *std::min_element(v.begin(), v.end()); Assert::AreEqual(-97.23, smallest_value); - auto largest_value = // TODO: + auto largest_value = *std::max_element(v.begin(), v.end()); Assert::AreEqual(48.78, largest_value); } TEST_METHOD(test_13) { std::vector atp_points { 8445, 7480, 6220, 5300, 5285 }; // the most interesting match is the one with the smallest difference - auto smallest_difference = // TODO: + std::sort(atp_points.begin(), atp_points.end()); + std::adjacent_difference(atp_points.begin(), atp_points.end(), atp_points.begin()); + int smallest_difference= *std::min_element(atp_points.begin(), atp_points.end()); Assert::AreEqual(15, smallest_difference); } };