Compilare: user.c: In function ‘main’: user.c:21:54: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(i==0.0 || i==2*min((double)r1,(double)r2) && (x1!=x2 || y1!=y2)) ^ user.c:13:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri.in","r",stdin); ^ user.c:14:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri.out","w",stdout); ^ user.c:15:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.c:18:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d",&x1,&y1,&r1,&x2,&y2,&r2); ^