bacan.cpp: In function `int rez()': bacan.cpp:31: warning: comparison between signed and unsigned integer expressions bacan.cpp:43: warning: control reaches end of non-void function bacan.cpp: In function `int main()': bacan.cpp:99: warning: comparison between signed and unsigned integer expressions /tmp/cc3jCHR2.o(.text+0x38a): In function `main': : the `gets' function is dangerous and should not be used.