Tinh Khoang cach

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

struct ToaDo
{
    float x;
    float y;
};

float tinhKhoangCach ( ToaDo A, ToaDo B)
{
    float result = sqrt( (A.x - B.x) * (A.x - B.x) + (A.y - B.y) * (A.y - B.y));
    return result;
}