Compilare: user.cpp: In function ‘int main()’: user.cpp:40: warning: comparison between signed and unsigned integer expressions user.cpp:43: warning: unused variable ‘j’ user.cpp: In function ‘void calculate()’: user.cpp:63: warning: unused variable ‘k’ user.cpp: In function ‘int* select(int)’: user.cpp:97: warning: comparison between signed and unsigned integer expressions user.cpp:95: warning: address of local variable ‘b’ returned user.cpp:84: warning: unused variable ‘nr’