Compilare: user.cpp: In function 'int cmp(const void*, const void*)': user.cpp:27: warning: converting to 'int' from 'long double' user.cpp:28: warning: converting to 'int' from 'long double' user.cpp: In function 'int main()': user.cpp:93: warning: use of 'll' length modifier with 'f' type character user.cpp: In function 'int cmp(const void*, const void*)': user.cpp:36: warning: control reaches end of non-void function