View Compilation Error

In file included from 0_0_32149607_22910.cpp:1:0:
0_0_32149607_22910.cpp: In function 'int main()':
0_0_32149607_22910.cpp:6:20: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  while((gets(ch))!=EOF)
                    ^