Compilare: user.cpp: In function 'void add(long unsigned int*, long unsigned int, long unsigned int&)': user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void print(long unsigned int*, long unsigned int)': user.cpp:38: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'long unsigned int gutui(long unsigned int (*)[2], long unsigned int, long unsigned int, long unsigned int)': user.cpp:43: warning: unused variable 'z' user.cpp:45: warning: unused variable 't' user.cpp: In function 'int main()': user.cpp:78: warning: unused variable 'j'