zone.cpp: In function 'int lee1(int, int)': zone.cpp:30: warning: no return statement in function returning non-void zone.cpp: In function 'int lee2(int, int)': zone.cpp:51: warning: no return statement in function returning non-void zone.cpp: In function 'int main()': zone.cpp:57: warning: suggest parentheses around '+' inside '>>' zone.cpp:75: warning: comparison between signed and unsigned integer expressions zone.cpp:90: warning: comparison between signed and unsigned integer expressions