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constant variable in c++ example

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Karan Chhillar answered on April 9, 2021 Popularity 9/10 Helpfulness 3/10

answer constant variable in c++ example

related constant arguments in c++

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constant variable in c++ example

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#include <iostream>
using namespace std;
 
// Driver Code
int main()
{
 
    // const int x;  CTE error
    // x = 9;   CTE error
    const int y = 10;
    cout << y;
 
    return 0;
}

Popularity 9/10 Helpfulness 3/10 Language cpp

Source: Grepper

Tags: c++

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Contributed on Oct 07 2022

Karan Chhillar

0 Answers Avg Quality 2/10

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constant arguments in c++

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#include <iostream>
#include <string>
#include <type_traits>

void function ( int v = 0 ) ; // declaration (header)

// definition of void function ( int )
void function( const int v ) { std::cout << v << '\n' ; /* definition */ }

// *** error: redefinition of void function ( int )
// void function( int v ) { std::cout << v << '\n' ; /* definition */ }

// declaration and definition
void function_two( const int v ) { std::cout << v << '\n' ; /* definition */ }

int main()
{
    function(7) ;

    using function_type = void( int )  ;
    function_type* fn = function ; // fine
    fn = function_two ; // also fine note: const is ignored

    using function_type_const = void( const int ) ; // note: const is ignored
    function_type_const* fnconst = function ; // fine
    fnconst = function_two ; // also fine

    std::cout << std::boolalpha << "void(int) and void( const int ) are the same type: "
              << std::is_same< void(int), void( const int ) >::value << '\n' ; // true
}

Popularity 8/10 Helpfulness 4/10 Language typescript

Source: cplusplus.com

Tags: arguments c++ c+

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Contributed on Jun 19 2022

Padhma Prakash 29

0 Answers Avg Quality 2/10

constants in cpp

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-1

#define identifier value

Popularity 10/10 Helpfulness 1/10 Language cpp

Source: www.tutorialspoint.com

Tags: c++

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Contributed on Apr 09 2021

Gleaming Grivet

0 Answers Avg Quality 2/10

c++ define constant

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-1

#include <iostream>
using namespace std;

#define PI 3.14159
#define NEWLINE '\n'

int main ()
{
  double r=5.0;               // radius
  double circle;

  circle = 2 * PI * r;
  cout << circle;
  cout << NEWLINE;

}
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Popularity 9/10 Helpfulness 1/10 Language cpp

Source: cplusplus.com

Tags: c++

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Contributed on Jun 14 2022

Kristi

0 Answers Avg Quality 2/10

constant variable in c++ example

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