Compilare: user.cpp: In function ‘int main()’: user.cpp:10:9: warning: unused variable ‘a’ [-Wunused-variable] int a,maxim=0,k,n,i,j; ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sushi.in","r",stdin); ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sushi.out","w",stdout); ^ user.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:16:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[k]); ^ user.cpp:10:25: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] int a,maxim=0,k,n,i,j; ^