zone.cpp: In function 'int main()': zone.cpp:48: warning: suggest parentheses around '+' inside '>>' zone.cpp:77: warning: comparison between signed and unsigned integer expressions zone.cpp:89: warning: comparison between signed and unsigned integer expressions In file included from /usr/include/string.h:640, from /usr/include/c++/4.4/cstring:45, from zone.cpp:4: In function 'void* memset(void*, int, size_t)', inlined from 'int main()' at zone.cpp:96: /usr/include/bits/string3.h:86: warning: call to void* __builtin___memset_chk(void*, int, unsigned int, unsigned int) will always overflow destination buffer