Error cin and cout were not declared

Question

hi guys i am a beginner in c++ kindly help me it says cout and cin were not declared

Answer 1

Did you include header file iostream?
#include<iostream>

Answer 2

because turbo c++ does not use standard c++ it is from last century.

Answer 3

#include <iostream>
using std::cout;
int main() {
cout << "This should also work\n";
return 0;
}

Answer 4

Yup, should be one or both of these answers. Otherwise, you'll need to post some code.

Answer 5

typos.. well the number one 1 and the lowercase L look pretty similar in codeplayground

Answer 6

not here. the best you can do here is ascii art in cpp. elsewhere yes. with the help of other libraries, (or you could even write your own lol; they are huuuge projects)

Answer 7

no, only the basics of the langauage. but by learning the language you will know how to talk to the libraries.

Answer 8

yeah, not fair right. codeplayground has limited support for compiled languages

Answer 9

You may need to add:

using namespace std;

below your include statements.

Answer 10

thanks guys it worked perfect i am in debt of you guys sirry i cant upvote comment as my account is not activated but i followed you two thanks again

Answer 11

It's endl not end1 and make sure you have your semicolons.

Answer 12

You need to end every statement with a semicolon!

Answer 13

guys can i make a graphical like with c++

Answer 14

but people made calcuLtor using html

Answer 15

yeah this is absolutely not fair limited support in compiled languages

Answer 16

you don't need "using namespace std" in turbo c++

Answer 17

thanks a lot guys for helping me
https://code.sololearn.com/c53S4Fpi9b30/?ref=app
this is the code plz plz tell mistakes in it
thanks again to everyone who answered my question

Answer 18

that problem was solved but still it doesnot give output i want plz help

Answer 19

#include <iostream>
using namespace std;

int main() {
int a;
int b;
int sum;
cin>>a;
cin>>b;
sum=a+b;
cout<<sum<<endl;
return 0;
}

Answer 20

oh thank you i am Trying