View Compilation Error

0_0_17019963_6834.cpp: In function 'int main()':
0_0_17019963_6834.cpp:8:37: error: 'scanf' was not declared in this scope
      while(scanf("%d %d %d",&n,&m,&k)!=EOF)
                                     ^
0_0_17019963_6834.cpp:8:40: error: 'EOF' was not declared in this scope
      while(scanf("%d %d %d",&n,&m,&k)!=EOF)
                                        ^
0_0_17019963_6834.cpp:43:47: error: 'printf' was not declared in this scope
                                printf("%d\n",i);
                                               ^
0_0_17019963_6834.cpp:47:45: error: 'printf' was not declared in this scope
                              {printf("%d ",i);}
                                             ^