View Compilation Error

0_0_28536850_1863.cpp: In function 'int main()':
0_0_28536850_1863.cpp:5:27: error: 'scanf' was not declared in this scope
  while((scanf("%d%d",&m,&n))!=EOF)
                           ^
0_0_28536850_1863.cpp:5:31: error: 'EOF' was not declared in this scope
  while((scanf("%d%d",&m,&n))!=EOF)
                               ^
0_0_28536850_1863.cpp:21:23: error: 'printf' was not declared in this scope
   printf("%d %d\n",x,y);
                       ^