Compilare: main.c: In function 'main': main.c:6:1: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("custi.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:1: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("custi.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:8:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&Nmatrix); ^~~~~~~~~~~~~~~~~~~~ main.c:11:8: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] { scanf("%d",&matrix[i][j]);matrix[i][j] = matrix[i][j] + matrix[i-1][j];} ^~~~~~~~~~~~~~~~~~~~~~~~~