main.cpp:5:2: error: ‘cin’ was not declared in this scope code example
Example 1: error: ‘cout’ was not declared in this scope
#include <iostream>
using namespace std;
adding above two lines before main will help you
NOTE:
note: suggested alternative:
In file included from class.cpp:1:0:
/usr/include/c++/7/iostream:61:18: note: ‘std::cout’
extern ostream cout;
^~~~
Example 2: cout was not declared in this scope
#include<iostream>
using namespace std;
int main(){
char t = 'f';
char *t1;
char **t2;
cout<<t;
return 0;
}