added some important algorithms

C++/multithreaded_algo.cpp

@@ -0,0 +1,97 @@
+// C++ program to demonstrate
+// multithreading using three
+// different callables.
+#include <iostream>
+#include <thread>
+using namespace std;
+
+// A dummy function
+void foo(int Z)
+{
+    for (int i = 0; i < Z; i++) {
+        cout << "Thread using function"
+                " pointer as callable\n";
+    }
+}
+
+// A callable object
+class thread_obj {
+public:
+    void operator()(int x)
+    {
+        for (int i = 0; i < x; i++)
+            cout << "Thread using function"
+                    " object as callable\n";
+    }
+};
+
+// class definition
+class Base {
+public:
+    // non-static member function
+    void foo()
+    {
+        cout << "Thread using non-static member function "
+                "as callable"
+             << endl;
+    }
+    // static member function
+    static void foo1()
+    {
+        cout << "Thread using static member function as "
+                "callable"
+             << endl;
+    }
+};
+
+// Driver code
+int main()
+{
+    cout << "Threads 1 and 2 and 3 "
+            "operating independently"
+         << endl;
+
+    // This thread is launched by using
+    // function pointer as callable
+    thread th1(foo, 3);
+
+    // This thread is launched by using
+    // function object as callable
+    thread th2(thread_obj(), 3);
+
+    // Define a Lambda Expression
+    auto f = [](int x) {
+        for (int i = 0; i < x; i++)
+            cout << "Thread using lambda"
+                    " expression as callable\n";
+    };
+
+    // This thread is launched by using
+    // lambda expression as callable
+    thread th3(f, 3);
+
+    // object of Base Class
+    Base b;
+
+    thread th4(&Base::foo, &b);
+
+    thread th5(&Base::foo1);
+
+    // Wait for the threads to finish
+    // Wait for thread t1 to finish
+    th1.join();
+
+    // Wait for thread t2 to finish
+    th2.join();
+
+    // Wait for thread t3 to finish
+    th3.join();
+
+    // Wait for thread t4 to finish
+    th4.join();
+
+    // Wait for thread t4 to finish
+    th5.join();
+
+    return 0;
+}