include include include using namespace std int main cout

#include<iostream>
#include<math.h>
#include<cstdlib>   
using namespace std;
int main(){

cout<<\"name \"<<\"\\t\";
cout<<\"Round-off error for trignometric identites\"<<\"\ \";
long double uLongDouble,vLongDouble;
double uDouble,vDouble;
float uFloat,vFloat;

cout<<\"Enter first angle in degree :\";
cin>>uLongDouble;

cout<<\"Enter second angle in degree :\";
cin>>vLongDouble;

uDouble = static_cast<double>(uLongDouble);
vDouble = static_cast<double>(vLongDouble);
uFloat=static_cast<double>(uLongDouble);
vFloat=static_cast<double>(vLongDouble);

long double ldEq1Err;

ldEq1Err = 1+(cos(uLongDouble)/sin(uLongDouble))^2-(sin(ulongDouble)/cos(uLongDouble))^2;

cout<<ldEq1Err ;
  
}
  

//why does it says like: [Error] \'ulongDouble\' was not declared in this scope

Solution

Hi,

I have fixed the issue and highlighted the code changes below. Issue with letter small \'l\' and \'L\'.

uLongDouble ---- ulongDouble

And also these is another issue ^ letter. Instead of that letter we have to use pow() method to get the suqare.

#include<iostream>
#include<math.h>
#include<cstdlib>   
using namespace std;
int main(){

cout<<\"name \"<<\"\\t\";
cout<<\"Round-off error for trignometric identites\"<<\"\ \";
long double uLongDouble,vLongDouble;
double uDouble,vDouble;
float uFloat,vFloat;

cout<<\"Enter first angle in degree :\";
cin>>uLongDouble;
cout<<\"Enter second angle in degree :\";
cin>>vLongDouble;
uDouble = static_cast<double>(uLongDouble);
vDouble = static_cast<double>(vLongDouble);
uFloat=static_cast<double>(uLongDouble);
vFloat=static_cast<double>(vLongDouble);

long double ldEq1Err;
ldEq1Err = 1+pow((cos(uLongDouble)/sin(uLongDouble)),2)-pow((sin(uLongDouble)/cos(uLongDouble)), 2);

cout<<ldEq1Err ;
  
}