added double jump and sitting state

term1/seminar03_initialization/02_repeat/main.cpp

@@ -0,0 +1,48 @@
+#include <iostream>
+#include <string>
+#include <string_view>
+
+using namespace std;
+
+string repeat1(string_view s)
+{
+    return string {
+    s}
+    +string {
+    s};
+}
+
+void repeat2(string & s)
+{
+    s += s;
+}
+
+void repeat3(string * s)
+{
+    *s += *s;
+}
+
+string *repeat4(string_view s)
+{
+    string *result = new string;
+    *result = string {
+    s} +string {
+    s};
+    return result;
+}
+
+int main()
+{
+    string meow;
+    cin >> meow;
+
+    cout << "test of repeat1:" << endl << repeat1(meow) << endl;
+
+    repeat2(meow);
+    cout << "test of repeat2:" << endl << meow << endl;
+
+    repeat3(&meow);
+    cout << "test of repeat3:" << endl << meow << endl;
+
+    cout << "test of repeat4:" << endl << *repeat4(meow) << endl;
+}

term1/seminar03_initialization/02_repeat/main.cpp~

@@ -0,0 +1,38 @@
+#include <iostream>
+#include <string>
+#include <string_view>
+
+using namespace std;
+
+string repeat1(string_view s) {
+    return string{s} + string{s};
+}
+
+void repeat2(string& s) {
+    s += s;
+}
+
+void repeat3(string* s) {
+    *s += *s;
+}
+
+string* repeat4(string_view s) {
+    string* result = new string;
+    *result = string{s} + string{s};
+    return result;
+}
+
+int main() {
+        string meow;
+        cin >> meow;
+
+        cout << "test of repeat1:" << endl << repeat1(meow) << endl;
+        
+        repeat2(meow);
+        cout << "test of repeat2:" << endl << meow << endl;       
+
+        repeat3(&meow);
+        cout << "test of repeat3:" << endl << meow << endl;       
+        
+        cout << "test of repeat4:" << endl << *repeat4(meow) << endl;       
+}