Compilare: user.cpp: In function ‘int main()’: user.cpp:13:22: warning: unused variable ‘num’ [-Wunused-variable] int i,j,lim=100,np=0,num=1,ci,cnt,t,i1,n; ^ user.cpp:13:28: warning: unused variable ‘ci’ [-Wunused-variable] int i,j,lim=100,np=0,num=1,ci,cnt,t,i1,n; ^ user.cpp:13:31: warning: unused variable ‘cnt’ [-Wunused-variable] int i,j,lim=100,np=0,num=1,ci,cnt,t,i1,n; ^ user.cpp:11:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sireturi.in","r",stdin); ^ user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sireturi.out","w",stdout); ^ user.cpp:24:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:26:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^