added double jump and sitting state

term1/seminar03_initialization/04_truncate_to_dot/main.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+void truncateToDot(string& s) {
+    s.resize(s.find('.'));
+    s.shrink_to_fit();
+}
+
+int main() {
+    std::string a = "cat.dog.mouse.elephant.tiger.lion";
+    std::string b = "wikipedia.org";
+    std::string c = ".com";
+    truncateToDot(a);
+    truncateToDot(b);
+    truncateToDot(c);
+
+    cout << a << endl
+         << b << endl
+         << c << endl;
+}