View Compilation Error

In file included from 0_0_23260587_24492.cpp:1:0:
0_0_23260587_24492.cpp: In function 'int main()':
0_0_23260587_24492.cpp:7:19: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  while(gets(str)!=EOF)
                   ^