根据线性代数32页:编写的,任意1点坐标绕某一点坐标逆时针旋转degree度,可用公式:
{x=x1*cos(degree)-y1*sin(degree);
}y=x1*sin(degree)+y1*sin(degree);
很方便;
#include<math.h>
#include<stdio.h>
#define pi 2*acos(0)
int main()
{
int i,j,k,m,n;
double x,y,x1,y1,degree,x2,y2,r;
while(scanf("%lf%lf%lf%lf%lf",&x1,&y1,&x2,&y2,°ree)!=EOF)
{
//printf("%lf",pi);
x=x2-x1;
y=y2-y1;
x2=x*cos((degree/180.0)*pi)-y*sin(degree/180*pi);
//printf("%lf %lf",cos((degree/180.0)*pi),sin(degree/180*pi));
//printf("%.5lf\n",cos(degree/180*pi));
y2=x*sin(degree/180*pi)+y*cos(degree/180*pi);
printf("%.1lf %.1lf\n",x2+x1,y2+y1);
}
return 0;
}