The C Programming language Chapter8 Functions ☆ Sorts of functions From the point of view of users Standard function (library function) provided by system Function writed by users From the function format Function with parameters Function without parametersThe C Programming Language Chapter 8 Functions ❖ Sorts of functions ➢ From the point of view of users ▪ Standard function (library function)： provided by system ▪ Function writed by users ➢ From the function format ▪ Function with parameters ▪ Function without parameters