Compilare: user.cpp: In function ‘int main()’: user.cpp:7:14: warning: unused variable ‘a’ [-Wunused-variable] long int a,b,c1=0,c2=0,c=0,d; ^ user.cpp:7:16: warning: unused variable ‘b’ [-Wunused-variable] long int a,b,c1=0,c2=0,c=0,d; ^ user.cpp:7:18: warning: unused variable ‘c1’ [-Wunused-variable] long int a,b,c1=0,c2=0,c=0,d; ^ user.cpp:7:23: warning: unused variable ‘c2’ [-Wunused-variable] long int a,b,c1=0,c2=0,c=0,d; ^ user.cpp:7:28: warning: unused variable ‘c’ [-Wunused-variable] long int a,b,c1=0,c2=0,c=0,d; ^ user.cpp:7:32: warning: unused variable ‘d’ [-Wunused-variable] long int a,b,c1=0,c2=0,c=0,d; ^