Compilare: user.cpp: In function ‘Nr add(Nr, Nr)’: user.cpp:101:9: warning: unused variable ‘eq’ [-Wunused-variable] int eq = 0; ^ user.cpp: In function ‘Piv Bracket(int&)’: user.cpp:136:17: warning: unused variable ‘prv’ [-Wunused-variable] int prv = i; ^ user.cpp: In function ‘void read()’: user.cpp:26:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:28:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^