Compilare: user.cpp: In function ‘int main()’: user.cpp:8:56: warning: variable ‘j’ set but not used [-Wunused-but-set-variable] int a1, b1, c1, a2, b2, c2, x, y, s, s1, s2, s3,i ,j , n, k=0; ^ user.cpp:8:63: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] int a1, b1, c1, a2, b2, c2, x, y, s, s1, s2, s3,i ,j , n, k=0; ^