Compilare: user.cpp:123:2: warning: no newline at end of file user.cpp: In function 'bool pairUp(int)': user.cpp:26: warning: comparison between signed and unsigned integer expressions user.cpp:36: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:110: warning: comparison between signed and unsigned integer expressions /tmp/cc0Qqh72.o: In function `main': user.cpp:(.text+0x207): warning: the `gets' function is dangerous and should not be used.