1)To install C++ you need to download it first.
You can Download C++ from here.
2)After downloading C++, extract it.Double click on the setup.exe file and a window will popup.
3)Click on the next button.A Licence Agreement window will be displayed.
4)Click on the First Option and then again a window will be displayed.Click on the install button.
5)When the program is installed click on the finish button.