Compilare: user.cpp: In function ‘int main()’: user.cpp:9:10: warning: unused variable ‘k’ [-Wunused-variable] {int n,i,k=0,nr1=0,nr2=0,nr3=0,s1,aux,c=0,n1,n2,n3; ^ user.cpp:9:32: warning: unused variable ‘s1’ [-Wunused-variable] {int n,i,k=0,nr1=0,nr2=0,nr3=0,s1,aux,c=0,n1,n2,n3; ^ user.cpp:9:43: warning: unused variable ‘n1’ [-Wunused-variable] {int n,i,k=0,nr1=0,nr2=0,nr3=0,s1,aux,c=0,n1,n2,n3; ^