View Compilation Error

0_0_38405099_14219.cpp: In function 'int main()':
0_0_38405099_14219.cpp:8:21: error: 'scanf' was not declared in this scope
  while(scanf("%d",&n)!=EOF && n!=-1){
                     ^
0_0_38405099_14219.cpp:8:24: error: 'EOF' was not declared in this scope
  while(scanf("%d",&n)!=EOF && n!=-1){
                        ^
0_0_38405099_14219.cpp:10:26: error: 'printf' was not declared in this scope
    printf("%lld\n",fib[n]);
                          ^