View Compilation Error

0_0_32203899_22127.cpp: In function 'int main()':
0_0_32203899_22127.cpp:14:16: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
    if(strlen(a<8)||strlen(a)>16)
                ^
0_0_32203899_22127.cpp:14:17: error: cannot convert 'bool' to 'const char*' for argument '1' to 'size_t strlen(const char*)'
    if(strlen(a<8)||strlen(a)>16)
                 ^