Please help me in solving this cpp program[solved]

Question

#include<iostream>

class rev
{
int k,n,sum,p;
public:
void input();
void calc();
void display();
};
void rev::input()
{
cout<<"\nEnter any integer to find the reverse of it";
cin>>n;
k=n;
}
void rev::calc()
{
sum=0;
while(n>0)
{
p=n%10;
sum=(sum*10)+p;
n=n/10;
}
}
void rev::display()
{
cout<<"\n\nThe no. you have entered is :"<<k;
cout<<"\n\nThe reverse of the no. is :"<<sum;
}
int main()
{
rev o;
o.input();
o.calc();
o.display();
}

Answer 1

You forget o include using namespace std; in your program cin cout .... These global objects belong to this library so it necessary to include that if u dont want write like this then u can do like this

using std::cout , std::endl;

Or you can write std when u using any of the object

Like this

std::cout<<" this is just for demo"<<std::endl;

Answer 2

https://code.sololearn.com/cI2MunRAfGuS/?ref=app

U need to add "using namespace std" so that everything (cout & cin ) must be defined under this std .... And no need to add std with every cout and cin statement

Answer 3

Pihu ( Not Active ) thanks, I forgot to put that

Answer 4

♨️A.S.♨️ thanks for helping me out