Compilare: user.cpp: In function ‘int main()’: user.cpp:38:14: warning: unused variable ‘n’ [-Wunused-variable] long long n,op,x,a1,a2,a3,a4,a5,mi,ma; ^ user.cpp:38:16: warning: unused variable ‘op’ [-Wunused-variable] long long n,op,x,a1,a2,a3,a4,a5,mi,ma; ^ user.cpp:38:19: warning: unused variable ‘x’ [-Wunused-variable] long long n,op,x,a1,a2,a3,a4,a5,mi,ma; ^ user.cpp:38:36: warning: unused variable ‘mi’ [-Wunused-variable] long long n,op,x,a1,a2,a3,a4,a5,mi,ma; ^ user.cpp:38:39: warning: unused variable ‘ma’ [-Wunused-variable] long long n,op,x,a1,a2,a3,a4,a5,mi,ma; ^ user.cpp:39:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eqs.in","r",stdin); ^ user.cpp:40:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eqs.out","w",stdout); ^ user.cpp:42:57: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld %lld %lld %lld",&a1,&a2,&a3,&a4,&a5); ^