C language programming course is an entry-level programming course, which is aimed at employees with little or no programming experience. By studying the basic grammar of C language programming, this course has a basic understanding of programming, which lays the foundation for the following computer professional courses and object-oriented programming courses. The main content of the course: the basic structure of C language program and related concepts, variables, functions, statements, if conditional statements, switch conditional statements, for loop statements, while loop statements, arrays, pointers, strings and structures.