View Compilation Error

0_0_28556583_6916.cpp: In function 'int main()':
0_0_28556583_6916.cpp:18:6: error: 'i' was not declared in this scope
  for(i=0;i<3;i++){
      ^
0_0_28556583_6916.cpp:21:16: error: 'i' was not declared in this scope
  printf("%d\n",i);
                ^