Compilare: user.c: In function ‘main’: user.c:66:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&T); ^ user.c:70:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&N); ^ user.c:73:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d %d",&a[k].x,&a[k].y); ^ user.c: In function ‘vecin’: user.c:33:5: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] return s; ^