Compilare: user.cpp:120:2: warning: no newline at end of file user.cpp: In function 'bool pairUp(int)': user.cpp:25: warning: comparison between signed and unsigned integer expressions user.cpp:35: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:107: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'bool pairUp(int)': user.cpp:44: warning: control reaches end of non-void function /tmp/cc3jbld5.o: In function `main': user.cpp:(.text+0x207): warning: the `gets' function is dangerous and should not be used.