Compilare: main.c: In function 'main': main.c:9:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("qtri.in","r",stdin),freopen("qtri.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("qtri.in","r",stdin),freopen("qtri.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:65: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("qtri.in","r",stdin),freopen("qtri.out","w",stdout),scanf("%d",&n); ^~~~~~~~~~~~~~ main.c:11:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f,&g,&h),printf("%s\n",C(g,h,a,b,c,d,e,f)&&C(g,h,c,d,e,f,a,b)&&C(g,h,e,f,a,b,c,d)?"DA":"NU"); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~