Compilare: user.c: In function ‘main’: user.c:10:1: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("joctv.in","r",stdin); ^ user.c:11:1: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("joctv.out","w",stdout); ^ user.c:12:1: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:14:1: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&A[i][j]),A[i][j]+=A[i][j-1]; ^