seminar04: fixes & 5

seminar04_templates/04_time/time.cpp

@@ -15,14 +15,11 @@ Time::Time(int hours, int minutes, int seconds)
 Time::Time(string_view s)
 {
     string buf;
-    buf[0] = s[0];
-    buf[1] = s[1];
+    buf = s.substr(0, 2);
     mHours = stoi(buf);
-    buf[0] = s[3];
-    buf[1] = s[4];
+    buf = s.substr(3, 2);
     mMinutes = stoi(buf);
-    buf[0] = s[6];
-    buf[1] = s[7];
+    buf = s.substr(6, 2);
     mSeconds = stoi(buf);
 }
 
@@ -62,7 +59,7 @@ vector < Time > getTimesFromString(string_view s)
     return res;
 }
 
-Time sumTimes(vector < Time > &v)
+Time sumTimes(const vector < Time > &v)
 {
     Time res;
     for (int i = 0, size = v.size(); i < size; ++i) {

seminar04_templates/04_time/time.h

@@ -17,5 +17,5 @@ public:
         friend std::ostream& operator<<(std::ostream& out, Time t);
 };
 
-Time sumTimes(vector<Time>& v);
+Time sumTimes(const vector<Time>& v);
 vector<Time> getTimesFromString(string_view s);

seminar04_templates/05_maximum/main.cpp

@@ -0,0 +1,34 @@
+#include <iostream>
+#include <string>
+#include <utility>
+#include <vector>
+
+using std::string, std::pair, std::cout, std::endl, std::vector;
+
+template <typename T>
+T maximum(const vector<T>& v) {
+    T max;
+    for(int i = 0, size = v.size(); i < size; ++i) {
+        if (v[i] > max)
+                max = v[i];
+    }
+    return max;
+}
+
+int main() {
+    vector<int> int_v {1,3,5,3,23,113,34,54};
+    cout << maximum(int_v) << endl;
+    vector<float> float_v {1.5,5.64,5.67,45.65,113,67.5,98.12};
+    cout << maximum(float_v) << endl;
+    vector<string> string_v {"aaaa", "dfg", "dsfdgjb", "meow", "dsfewvcv", "klafdn"};
+    cout << maximum(string_v) << endl;
+    vector<pair<int, int>> pair_v {
+            {113, 1},
+            {12, 3},
+            {45, 34},
+            {113, 113},
+            {112, 12233}
+    };
+    pair<int, int> res = maximum(pair_v);
+    cout << "(" << res.first << ", " << res.second << ")" << endl;
+}

seminar04_templates/pairing_test.cpp

@@ -1,55 +0,0 @@
-#include <iostream>
-#include <vector>
-#include <array>
-#include <string>
-#include <utility>
-using std::cout, std::endl;
-
-template <typename T>
-std::ostream& operator<<(std::ostream& out, const std::vector<T>& v)
-{
-    out << "[";
-    for (size_t i = 0; i < v.size() - 1; ++i)
-        out << v[i] << ", ";
-
-    if (!v.empty())
-    {
-        out << v.back();
-    }
-    out << "]";
-    return out;
-}
-
-template <typename T, typename U>
-std::ostream& operator<<(std::ostream& out, const std::pair<T, U>& p)
-{
-    out << "(" << p.first << ", " << p.second << ")";
-    return out;
-}
-
-
-// Нужно написать функцию pairing
-
-
-int main()
-{
-    std::vector v {10, 20, 30, 40, 50, 60};
-    cout << pairing(v) << endl;
-
-
-    std::array<std::string, 7> a {"cat", "dog", "mouse", "elephant", "tiget", "axolotl", "wolf"};
-    cout << pairing(a) << endl;
-
-
-    std::string s {"Cats and dogs!"};
-    cout << pairing(s) << endl;
-}
-
-
-/*
-    Программа должна напечатать:
-
-    [(10, 20), (30, 40), (50, 60)]
-    [(cat, dog), (mouse, elephant), (tiget, axolotl), (wolf, )]
-    [(C, a), (t, s), ( , a), (n, d), ( , d), (o, g), (s, !)]
-*/