已知三点,求三点组成的三角形面积的程序

Question

已知三点,求三点组成的三角形面积的程序

Answer 1

#include
#include
void main()
{
float x1,y1,x2,y2,x3,y3;
float a,b,c,n;
float s;
printf("Please enter the point");
scanf("%f",&x1);
scanf("%f",&y1);
scanf("%f",&x2);
scanf("%f",&y2);
scanf("%f",&x3);
scanf("%f",&y3);
a = sqrt((x2-x1)^2+(y2-y1)^2);
b = sqrt((x3-x1)^2+(y3-y1)^2);
c = sqrt((x3-x2)^2+(y3-y2)^2);
n = (a+b+c)/2;
s = sqrt(n*(n-a)*(n-b)*(n-c))；
printf("%.2f\n",&s);
}
假如公式没记错的话,这个应该没有问题~