why does not this code work?

Question

#include <iostream>
using namespace std;

int main(){
int line1, line2, mohi=(line1+line2)*2 ,masa=line1*line2;

cout<<"enter the first side of rectangle: "<<endl;
cin>>line1;
cout<<"enter the second side of rectangle: "<<endl;
cin>>line2;

cout<<endl<<endl<<endl<<"masahat: "<<masa<<endl<<"mohit: "<<mohi;
return 0;
}

Answer 1

first assign values to variable
then set the operations latter.
try this:

#include <iostream>
using namespace std;

int main(){
int line1, line2;

cout<<"enter the first side of rectangle: "<<endl;
cin>>line1;
cout<<"enter the second side of rectangle: "<<endl;
cin>>line2;
int masa=line1*line2;
int mohi=(line1+line2)*2 ;
cout<<endl<<endl<<endl<<"masahat: "<<masa<<endl<<"mohit: "<<mohi;
return 0;
}