Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19:26: error: ‘retrun’ was not declared in this scope out<<"0\n";out.close();retrun 0; ^ user.cpp:19:33: error: expected ‘;’ before numeric constant out<<"0\n";out.close();retrun 0; ^ user.cpp: At global scope: user.cpp:21:1: error: expected unqualified-id before ‘else’ else if(!b||a==1) ^ user.cpp:25:1: error: ‘d’ does not name a type d=2; ^ user.cpp:26:1: error: expected unqualified-id before ‘while’ while(d*d<=a) ^