Compilare: user.c: In function ‘main’: user.c:50:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi2.in","r",stdin); ^ user.c:51:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi2.out","w",stdout); ^ user.c:53:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.c:56:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&taran[i].x1,&taran[i].y1); ^ user.c:57:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&taran[i].x2,&taran[i].y2); ^ user.c:58:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&taran[i].x3,&taran[i].y3); ^ user.c:61:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&fantx,&fanty); ^ user.c:94:8: warning: ‘taranmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] my3=taran[taranmax].y3; ^