Compilare: user.cpp: In function ‘int main()’: user.cpp:15:9: warning: unused variable ‘a’ [-Wunused-variable] int a,b,i,j,t,temp,t1,t2; ^ user.cpp:15:11: warning: unused variable ‘b’ [-Wunused-variable] int a,b,i,j,t,temp,t1,t2; ^ user.cpp:15:24: warning: unused variable ‘t1’ [-Wunused-variable] int a,b,i,j,t,temp,t1,t2; ^ user.cpp:15:27: warning: unused variable ‘t2’ [-Wunused-variable] int a,b,i,j,t,temp,t1,t2; ^