题解 | 绕距
绕距
https://www.nowcoder.com/practice/7a245fc6284f4139b4fb21de58e68483
#include<stdio.h>
#include<math.h>
int main()
{
int x1, x2, y1, y2;
scanf("%d%d", &x1,&y1 );
scanf("%d%d", &x2, &y2);
double de, dm, a;
de = sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
dm = fabs(x1 - x2) + fabs(y1 - y2);
a = fabs(dm - de);
printf("%.12lf", a);
return 0;
}
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