Question

give an example for global variable declaration C++ program​

Answer 1

Explanation:

Answer:

Variable Scope in C++ Inside a function or a block which is called local variables, The variables which are declared outside of all the function and accessible from all functions including main function are known as Global variables.

Consider the program: In this Example, we have shown how global and local variable behave and to manipulate them.

#include <iostream>

using namespace std;

// defining the global variable

int a=10;

int main()

{

   //local variable

   int a=15;

   cout<<"local a: "<<a<<" Global a: "<<::a;

   

   // Re-defining global variable by using ::

   ::a=20;

   cout<<"\nlocal a: "<<a<<" Global a: "<<::a;

   return 0;

}

Output

local a: 15 Global a: 10

local a: 15 Global a: 20

Answer 2

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}$

INPUT:

#include <iostream.h>

#include <conio.h>

int main ( )

{

clrscr( );

int g;

int a, b;

a = 10;

b = 20;

g = a + b;

cout << g;

getch( );

}

Output:

30