พื้นฐานการเขียนโปรแกรมภาษา C (ฉบับย่อ)
https://kongruksiam.medium.com/%E0%B8%9E%E0%B8%B7%E0%B9%89%E0%B8%99%E0%B8%90%E0%B8%B2%E0%B8%99%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%80%E0%B8%82%E0%B8%B5%E0%B8%A2%E0%B8%99%E0%B9%82%E0%B8%9B%E0%B8%A3%E0%B9%81%E0%B8%81%E0%B8%A3%E0%B8%A1%E0%B8%A0%E0%B8%B2%E0%B8%A9%E0%B8%B2-c-%E0%B8%89%E0%B8%9A%E0%B8%B1%E0%B8%9A%E0%B8%A2%E0%B9%88%E0%B8%AD-bb1f3bec80b8