Compilare: user.cpp: In function 'void print_a(double (*)[70])': user.cpp:27: warning: format '%Lf' expects type 'long double', but argument 2 has type 'double' user.cpp: In function 'void read()': user.cpp:39: warning: format '%lf' expects type 'double*', but argument 2 has type 'long double*' user.cpp: In function 'void solve()': user.cpp:64: warning: unused variable 'j'