showroom.cpp: In function `void val(str&)': showroom.cpp:44: warning: comparison between signed and unsigned integer expressions showroom.cpp: In function `int main()': showroom.cpp:142: warning: comparison between signed and unsigned integer expressions showroom.cpp:157: warning: comparison between signed and unsigned integer expressions showroom.cpp:158: warning: comparison between signed and unsigned integer expressions showroom.cpp:172: warning: comparison between signed and unsigned integer expressions showroom.cpp:176: warning: comparison between signed and unsigned integer expressions /tmp/cc9WsOal.o(.text+0x99d): In function `main': : the `gets' function is dangerous and should not be used.