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It is just larger than the distance to another tangent line...

P.S.Sorry for my poor English...I can't express myself clearly....

Is there any possible the shortest distance is a line which crosses the circle?
My problem may fail on that condition but I think it' s impossible. The angle must larger than 90 degree.....

Please give me that data... I've tested all of them earlier than this submit and got the same answer as the poster.
P.S. At that time.. I was modifying my program, perhaps there may be some fault....

My solution to this problem is wa. I think it's a precision fault. Could someone give me an advice on it? THX...

Here is my code...

#include <stdio.h>
#include <math.h>
#include <string.h>


inline long double absx(long double x){
return x-0>1.0e-8?x:-x;
}

char buffer[10];

int main(){
int v ...