Compilare: main.c: In function 'main': main.c:28:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("tritzi.in","r",stdin),freopen("tritzi.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:28:36: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("tritzi.in","r",stdin),freopen("tritzi.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:28:69: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("tritzi.in","r",stdin),freopen("tritzi.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~ main.c:30:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&p),a[0][0]=a[0][2]=a[1][1]=a[1][2]=a[2][0]=a[2][1]=a[2][2]=1,a[0][1]=a[1][0]=0,C(d,a),P(e,a,a),--n; ^~~~~~~~~~~~~~~~~~~