C语言实现cordic算法求sin和cos值

附C程序：

#include 

double  cordic(double angle_para);

int  main(void)

{

     double para;

     para=30;

    cordic(para);

    return 0;

}

double    cordic(double angle_para)

{

     const double tangent[ ] ={1.0, 1/2.0, 1/4.0, 1/8.0, 1/16.0, 1/32.0, 1/64.0, 1/128.0, 1/512.0};

     const double  angle [ ] = { 45.0, 26.6, 14, 7.1, 3.6, 1.8, 0.9, 0.4, 0.2, 0.1 };

     int i, signal;

    double x_cos, y_sin, x_temp, y_temp, z, z_next;

    x_cos =0; y_sin=0; z=angle_para; z_next=0;

    x_temp =0.6073; y_temp=0;

     signal = 1;

  

  for (i=0; i<9; i++) 

 {

   x_cos=x_temp - signal * y_temp * tangent [ i ];

  y_sin=y_temp+ signal * x_temp * tangent [ i ];

  z_next = z - signal * angle [ i ];

  x_temp = x_cos;

  y_temp = y_sin;

  z = z_next;

 if(z_next>0)

   signal = +1;

else

   signal = -1; 

}

printf("x_cos = %f, y_sin = %f",x_cos,y_sin);

return 0;

}