How to use c swap function

0 votes

It is OK to write swap(a,b);

There is an issue when I write swap(&c[0],&d[0]);. 

Can anyone explain why?

#include<iostream>
#include<algorithm>
using namespace std;

int main(void){
    int *a;
    int *b;
    int c[]={1,2};
    int d[]={3,4};
    a=&c[0];
    b=&d[0];
    swap(a,b);// it is ok
    //swap(&c[0],&d[0]);// it is error why
    cout<<a[0]<<" "<<b[0]<<endl;
    cin.get();
}

Jul 1, 2022 in C++ by Nicholas
• 7,760 points
341 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

Related Questions In C++

0 votes
1 answer

How to use std::sort to sort an array in C++

We receive std::begin and std::end in C++0x/11, which are overloaded for arrays: #include <algorithm> int main(){ int v[2000]; ...READ MORE

answered Jun 1, 2022 in C++ by Damon
• 4,960 points
1,148 views
0 votes
1 answer

How to use new[ ] and delete[ ] operator in C++

int main(){ char *str; ...READ MORE

answered Jun 20, 2022 in C++ by Damon
• 4,960 points
577 views
0 votes
1 answer

How to use enums in C++

This will be sufficient to declare your ...READ MORE

answered Jun 20, 2022 in C++ by Damon
• 4,960 points
629 views
0 votes
1 answer

how could I use the power function in c/c++ without pow(), functions, or recursion

It is part of a series.  Replace pow() with the previous iteration's value. There is no need for code to call pow ().  Pow(x, 5 * I - 1) and pow(-1, I - 1) may be formed since both have an int exponent dependent on the iterator I from the previous loop iteration. Example: Let f(x, i) = pow(x, 5 * i ...READ MORE

answered Jun 21, 2022 in C++ by Damon
• 4,960 points
2,524 views
0 votes
0 answers

How to use setprecision in C++

I'm new to C++ and all I want to do is print my point number up to two digits.  For example, if the number is 3.444, the output should be 3.44, and if the number is 99999.4234, the output should be 99999.42.  How am I going to do that?  The value changes over time.  This is my code. #include <iomanip.h> #include <iomanip> int main() { ...READ MORE

Jul 5, 2022 in C++ by Nicholas
• 7,760 points
777 views
0 votes
0 answers

How to use enums in C++

Suppose we have an enum like the following: enum Days ...READ MORE

Jul 7, 2022 in C++ by Nicholas
• 7,760 points
541 views
0 votes
1 answer

setuptools: build shared libary from C++ code, then build Cython wrapper linked to shared libary

There is a seemingly undocumented feature of setup that ...READ MORE

answered Sep 11, 2018 in Python by Priyaj
• 58,020 points
693 views
0 votes
1 answer

setuptools: build shared libary from C++ code, then build Cython wrapper linked to shared libary

There is a seemingly undocumented feature of setup that ...READ MORE

answered Sep 21, 2018 in Python by Priyaj
• 58,020 points
2,409 views
0 votes
1 answer

How to pass large records to map/reduce tasks?

Hadoop is not designed for records about ...READ MORE

answered Sep 25, 2018 in Big Data Hadoop by Frankie
• 9,830 points
1,459 views
0 votes
1 answer

Invalid method parameters for eth_sendTransaction

params needs to be an array, try {"jsonrpc":"2.0","method":"eth_se ...READ MORE

answered Sep 28, 2018 in Blockchain by digger
• 26,740 points
1,864 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP