Question

2，输入两个坐标(x1,y1),(x2,y2),计算并输出两点间的距离。

Answer 1

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

int main(){
double x1,y1,x2,y2,dx,dy;
printf("请输入第一个座标:\n");
scanf("%lf %lf",&x1,&y1);
printf("请输入第二个座标:\n");
scanf("%lf %lf",&x2,&y2);
dx=x1-x2;
dy=y1-y2;
dx=sqrt(dx*dx+dy*dy);
printf("%lf\n",dx);
return 0;
}

Answer 2

s = sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2))

Answer 3

麽分

Answer 4

根号下[（x1-x2）+(y1-y2)]