View Compilation Error

0_0_29281798_9776.cpp: In function 'int main()':
0_0_29281798_9776.cpp:4:24: error: 'scanf' was not declared in this scope
     while(scanf("%d",&n) != EOF)
                        ^
0_0_29281798_9776.cpp:4:29: error: 'EOF' was not declared in this scope
     while(scanf("%d",&n) != EOF)
                             ^
0_0_29281798_9776.cpp:9:13: error: 'nu' was not declared in this scope
             nu[i]=nu[i-1]+nu[i-2];
             ^
0_0_29281798_9776.cpp:11:29: error: 'nu' was not declared in this scope
             printf("%lld\n",nu[n-1]);
                             ^
0_0_29281798_9776.cpp:11:36: error: 'printf' was not declared in this scope
             printf("%lld\n",nu[n-1]);
                                    ^