Compilare: user.cpp: In function ‘int main()’: user.cpp:36:11: warning: unused variable ‘a’ [-Wunused-variable] int i,a,n,st,dr,v[N]; ^ user.cpp:36:15: warning: unused variable ‘st’ [-Wunused-variable] int i,a,n,st,dr,v[N]; ^ user.cpp:36:18: warning: unused variable ‘dr’ [-Wunused-variable] int i,a,n,st,dr,v[N]; ^ user.cpp:37:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.in","r",stdin); ^ user.cpp:38:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algsort.out","w",stdout); ^ user.cpp:39:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:41:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^