C语言 指教坐标转换为极坐标

C语言 指教坐标转换为极坐标

#include
#include

struct complex_s{
        double x,y;
};

double real_part(struct complex_s z){
        return z.x;
}

double img_part(struct complex_s z){
        return z.y;
}

double magnitude(struct complex_s z){
        return sqrt(z.x*z.x +  z.y*z.y);
}

double angle(struct complex_s z){
        return atan2(z.y, z.x);
}

struct complex_s make_from_real_img(double x, double y){
        struct complex_s z;
        z.x = x;
        z.y = y;
        return z;
}
struct complex_s make_from_mag_ang(double r, double A){
        struct complex_s z;
        z.x = r * cos(A);
        z.y = r * sin(A);
        return z;
}

struct complex_s add_complex(struct complex_s z1,struct complex_s z2){
        return make_from_real_img(real_part(z1)+real_part(z2),
                img_part(z1) + img_part(z2));
}
struct complex_s sub_complex(struct complex_s z1,struct complex_s z2){
        return make_from_real_img(real_part(z1)-real_part(z2),
                img_part(z1) - img_part(z2));
}
struct complex_s mul_complex(struct complex_s z1,struct complex_s z2){
        return make_from_mag_ang(real_part(z1)*real_part(z2),
                img_part(z1) + img_part(z2));
}
struct complex_s div_complex(struct complex_s z1,struct complex_s z2){
        return make_from_mag_ang(real_part(z1)/real_part(z2),
                img_part(z1) + img_part(z2));
}

int main(void){
        struct complex_s z1 = {3.0,4.0};
        struct complex_s z2= {2.0,5.0};

        struct complex_s x;
        x = add_complex(z1,z2);
        printf("x={%f,%f}",x.x,x.y);
        return 0;
}

结果：

[root@localhost struct]# ./jizuobiao.out 
x={5.000000,9.000000}