ikun崩溃代码

解题思路:

注意事项:

参考代码:

#include <stdio.h>

#include <math.h>

int main()

{

double x1,y1,x2,y2,x3,y3;

double s,p,a,b,c;

scanf("%lf %lf\n",&x1,&y1);

scanf("%lf %lf\n",&x2,&y2);

scanf("%lf %lf\n",&x3,&y3);

  c=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));/*c是点a,b*/

  b=sqrt((x1-x3)*(x1-x3)+(y1-y3)*(y1-y3));/*b是点a,c*/

  a=sqrt((x2-x3)*(x2-x3)+(y2-y3)*(y2-y3));/*a是点b,c*/

  p=(a+b+c)/2;

  s=sqrt(p*(p-a)*(p-b)*(p-c));

  printf("%.2lf",s);

  return 0;

}