C++ Basic Structure | C++ Programming Lessons

Very Basic Structure of C++

Structure of C++

Structure of any programming language defines the sequence or the way a programmer writes the code 

The basic structure of a C++ program consists of the following components:

1. Preprocessor directives: These are lines that begin with a # symbol and are used to include files or define constants and macros.
2. Function declarations: These are the prototypes for functions that are defined in the program.
3. Global variables: These are variables that are defined outside of any function and are accessible to all functions in the program.
4. The main function: This is the starting point of the program. It is a special function that is called when the program is run.
5. Other functions: These are additional functions that are defined in the program and perform specific tasks.

Here is an example of a simple C++ program that demonstrates this structure:

#include <iostream> 
// function declarations 
int add(int x, int y);
void print_result(int result); 
// global variables 
const int MAX_VALUE = 100;
int main() 
{ 
int a = 10, b = 20;
  int c = add(a, b);
 print_result(c);
return 0;
 } 
// function definitions 
int add(int x, int y)
{
  return x + y;
} 
void print_result(int result) 
{ 
std::cout << "Result: " << result << std::endl;
 }

This program defines two functions: "add" and "print_result", and a global constant "MAX_VALUE". The "main" function is the entry point of the program and it calls the other functions to perform specific tasks.