Compilare: user.cpp: In function ‘void kruskal()’: user.cpp:100:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, aux; ^ user.cpp:100:15: warning: unused variable ‘aux’ [-Wunused-variable] int i, j, aux; ^ user.cpp: In function ‘int main()’: user.cpp:130:21: warning: format ‘%f’ expects argument of type ‘double’, but argument 2 has type ‘int’ [-Wformat=] printf("%f\n", 0); ^