View Compilation Error

0_0_31405391_19587.cpp: In function 'int main()':
0_0_31405391_19587.cpp:16:19: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
             if(p>='0'&&p<='9')
                   ^
0_0_31405391_19587.cpp:16:27: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
             if(p>='0'&&p<='9')
                           ^