Another is the system library functions precomposed by C language, which can be directly used by programmer.

研究了使自定义函数也成为系统库函数的方法，以提高使用C语言进行编程的效率。

youdao

Another is the system library functions precomposed by C language, which can be directly used by programmer.

研究了使自定义函数也成为系统库函数的方法，以提高使用C语言进行编程的效率。

youdao