Compilare: user.cpp: In function ‘int main()’: user.cpp:49:14: warning: variable ‘imax’ set but not used [-Wunused-but-set-variable] int maxv,imax,jmax; ^ user.cpp:49:19: warning: variable ‘jmax’ set but not used [-Wunused-but-set-variable] int maxv,imax,jmax; ^ user.cpp:52:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.in","r",stdin); ^ user.cpp:53:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.out","w",stdout); ^ user.cpp:55:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:60:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] h[i][j]); ^