Blog entries - Codeforces

→ Pay attention

Before contest
Rayan Programming Contest 2024 - Selection (Codeforces Round, Div. 1 + Div. 2)
5 days
Register now »

*has extra registration

→ Top rated

#	User	Rating
1	tourist	3993
2	jiangly	3743
3	orzdevinwang	3707
4	Radewoosh	3627
5	jqdai0815	3620
6	Benq	3564
7	Kevin114514	3443
8	ksun48	3434
9	Rewinding	3397
10	Um_nik	3396

Countries | Cities | Organizations

View all →

→ Top contributors

#	User	Contrib.
1	cry	167
2	Um_nik	163
3	maomao90	162
3	atcoder_official	162
5	adamant	159
6	-is-this-fft-	158
7	awoo	156
8	TheScrasse	154
9	Dominater069	153
10	nor	152

View all →

→ Find user

→ Recent actions

Detailed →

omhari's blog

Use of std::function in c++

By omhari, history, 3 years ago, In English

Is there any difference between normal function

Code

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

int square(int a)
{
    return a*a;
}
int main() 
{
    cout<<square(5);
    return 0; 
}

and a function created using std::function

Code

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

int main() 
{
    function<int(int)> square=[&](int a){
        return a*a;
    };

    cout<<square(5);
    return 0; 
}

Full text and comments »

c++

omhari
3 years ago
9