Compilare: user.cpp: In function ‘int main()’: user.cpp:7:14: warning: unused variable ‘x’ [-Wunused-variable] int t,i1,x,n,y,sens,i,num=0,j; ^ user.cpp:7:18: warning: unused variable ‘y’ [-Wunused-variable] int t,i1,x,n,y,sens,i,num=0,j; ^ user.cpp:7:20: warning: unused variable ‘sens’ [-Wunused-variable] int t,i1,x,n,y,sens,i,num=0,j; ^ user.cpp:5:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("magicsequence.in","r",stdin); ^ user.cpp:6:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("magicsequence.out","w",stdout); ^ user.cpp:8:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:11:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:13:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^