Find area of rectangle??? Where m i wrong?? I can't get any output!!!!

Question

#include<iostream>
using namespace std;

class area rect
{
public:
int len, width, res ;
area(int a, int b);
};
int area rect :: area(int a, int b)
{
res=a*b;
return res;
}
void main()
{
int res;
area rect a;
a.len = 2;
a.width= 7;
res= a.area(2,7);
cout <<"area of rect"<< res ;
}

Answer 1

Mistakes:
× Define return type for function 'area'
× main() must return an int
× There is no type 'area', do not use it as type

#include <iostream>
using namespace std;

class rect{
public:
int len, bre, res ;
int area(int a, int b);
};
int rect :: area(int a, int b){
res=a*b;
return res;
}
int main()
{
int res;
rect a;
a.len = 2;
a.bre = 7;
res= a.area(2,7);
cout <<"area of rect: "<< res ;
}

Answer 2

No, you can't, somehow switched the keyword.. it's #include.

(Reply to: "thanks.....now I got it......but 1 question.......can I replace import to include")

Answer 3

why did you use len,width there?

Answer 4

#include<iostream>
using namespace std;
class area{
public:
int rect(int a,int b);
}
area::rect(int a,int b)
{
return a*b;
}
int main()
{
int l,b;
area a;
cout<<"Enter length";
cin>>l;
cout<<"Enter breadth";
cin>>b;
cout<<"Area is"<<a.rect(l,b);
return 0;
}