C programming function
In this chapter you will be familiar with both functions of User Defined and Standard Library in C programming. Besides, you will learn how to use programming functions.The function is the block of code that performs a specific task.
Suppose, to create a graphics program, a class, a circle and some color, which depends on the length, radius and color of the user respectively. You can use three functions to solve this problem.
Class function
Circle function
Color function
Splitting large problems into smaller sections is easy to understand and develop.
Types of functions in C program
Based on the functions defined by the user and the already existing function in the compiler, there are two types of functions in C programming. Such as
Standard Library Function
User Defined Function
Standard Library Function
The standard library function in C programming is the function of its predecessor or C, which can be used to perform mathematical calculations, input-output processing, string handling, etc.
These functions are defended in the header file. When these headers files are connected to a program, these functions act as their own function in the source code. For example:
printf () is a standard library function that sends formatted output to the screen. This function is defended in the "stdio.h" header file.
There are also many functions that are defended in "stdio.h" header files like scanf (), getchar (), fprintf () etc. Whenever you connect the "stdio.h" header file to your program, these functions will become more common for your program.
To learn more, please visit the Standard Library Function section of C programming.
User Defined Function
It has already been mentioned that the C programmers have agreed to define functions. These functions are defined by the user as they are called user defining functions.
You can define the functions you want, based on the program's claims and complexity.
How Does User Defence Function Work?
#include <stdio.h>
void userDefinedFunction ()
{
... .. ...
... .. ...
}
int main ()
{
... .. ...
... .. ...
userDefinedFunction ();
... .. ...
... .. ...
}
Execution of C program starts from the main () function.
Compiler when userDefinedFunction (); When the function is seen, the control of the program jumps and goes near void userDefinedFunction ().
The compiler then started executing the codes of user defined functions.
User Defined Function Codes After the execution is complete, the program's control will be restored with the main () function userDefinedFunction (); Come to it.
How does the function of C program work?
Remember, the name of the function is an identifier which must be unique.
It's user defined functions overview. Visit the following pages to find out more
C user defining function
Types of User Defined Functions
User Defined Function Facilities
Understanding, maintaining and debugging programs becomes easier.
With the increase of reusability, codes can be used in other programs.
Large programs can be divided into small modules. So big projects can be shared to many programmers.
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