View Compilation Error

In file included from 0_0_35966701_26713.cpp:1:0:
0_0_35966701_26713.cpp: In function 'int main()':
0_0_35966701_26713.cpp:7:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
     while (gets(a) != EOF)
                       ^