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how to pass function as a parameter in c++

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Udituk answered on July 13, 2021 Popularity 10/10 Helpfulness 5/10

answer how to pass function as a parameter in c++

related c++ pass function as argument

related C++ Function with Parameters

how to pass function as a parameter in c++

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#include <bits/stdc++.h> 
using namespace std;

int add(int x, int y){return x+y;}
int sub(int x, int y){return x-y;}
int operation (int x, int y,int (*function)(int,int)){return function(x,y);}
int operation2(int x, int y,std::function<int(int, int)> function){return function(x,y);}

int main()
{
    std::cout <<"Values 1 & 3. Pointer function: Add:"<<operation (1,3,&add)<<" Sub:"<<operation (1,3,&sub) << std::endl;
    std::cout <<"Values 1 & 3. std::function   : Add:"<<operation2(1,3,&add)<<" Sub:"<<operation2(1,3,&sub) << std::endl;
}

Popularity 10/10 Helpfulness 5/10 Language cpp

Source: www.codingame.com

Tags: c++

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Contributed on Jul 13 2021

Udituk

0 Answers Avg Quality 2/10

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c++ pass function as argument

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class MyClass
{
    public:
        MyClass();

        // Note: No longer marked `static`, and only takes the actual argument
        void Callback(int x);
    private:
        int private_x;
};

MyClass::MyClass()
{
    using namespace std::placeholders; // for `_1`

    private_x = 5;
    handler->addHandler(std::bind(&MyClass::Callback, this, _1));
}

void MyClass::Callback(int x)
{
    // No longer needs an explicit `instance` argument,
    // as `this` is set up properly
    cout << x + private_x << endl;
}

Popularity 9/10 Helpfulness 2/10 Language cpp

Source: stackoverflow.com

Tags: c++

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Contributed on Mar 29 2022

Inquisitive Iguana

0 Answers Avg Quality 2/10

C++ Function with Parameters

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-1

// program to print a text

#include <iostream>
using namespace std;
// display a number
void displayNum(int n1, float n2) {
    cout << "The int number is " << n1;
    cout << "The double number is " << n2;
}
int main() {
     
     int num1 = 5;
     double num2 = 5.5;

    // calling the function
    displayNum(num1, num2);

    return 0;
}

Popularity 8/10 Helpfulness 1/10 Language cpp

Source: Grepper

Tags: c++ function

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Contributed on Jun 13 2022

SAMER SAEID

0 Answers Avg Quality 2/10

how to pass function as a parameter in c++

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