Hello,

Free courses are available throughout the web. There are tutorial videos in Youtube also.

To learn from such sources is okay as long as you are learning it out of interest. But if you are learning it as a skill and want to include it in your resume, then you must do certificate course. You can endorse this certificate.

Some online sites that offer C++ certificate courses (both paid and free) are:

• Coding Ninjas
• Coursera
• Udemy

Hope this helps.

Thanks.