update

main.cpp

@@ -0,0 +1,17 @@
+#include <iostream> // for std::cout
+
+// Definition of user-defined function doPrint()
+void doPrint() // doPrint() is the called function in this example
+{
+    std::cout << "In doPrint()\n";
+}
+
+// Definition of function main()
+int main()
+{
+    std::cout << "Starting main()\n";
+    doPrint();                      // Interrupt main() by making a function call to doPrint().  main() is the caller.
+    std::cout << "Ending main()\n"; // this statement is executed after doPrint() ends
+
+    return 0;
+}