Compilare: user.cpp: In function ‘void multiply(double**, double**, double**, int)’: user.cpp:17:33: warning: non-constant array size in new, unable to verify length of initializer-list [enabled by default] R[i] = new double[size] { 0.0 }; ^ user.cpp: In function ‘void lg_power(double**, int, long int)’: user.cpp:47:33: warning: non-constant array size in new, unable to verify length of initializer-list [enabled by default] R[i] = new double[size] { 0.0 }; ^ user.cpp: In function ‘int main()’: user.cpp:98:38: warning: non-constant array size in new, unable to verify length of initializer-list [enabled by default] matrix[i] = new double[N + 1]{ 0.0 }; // all 0 ^