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,a,b;
float d,c;
scanf("%d %d",&x1,&y1);
scanf("%d %d",&x2,&y2);
a=x1-x2;
b=y1-y2;
d=sqrt(a*a+b*b);
c=sqrt(a*a)+sqrt(b*b);
printf("%f",sqrt((d-c)*(d-c)));
return 0;
}
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