vectors cross product 3d

#include <stdio.h>
#include <stdlib.h>

typedef struct{
    double x;
    double y;
    double z;
}Vector3;

void printVector(Vector3 v)
{
    printf("%f %f %f\n", v.x, v.y, v.z);
}

Vector3 vectCrossProduct(Vector3 a, Vector3 b)
{
    Vector3 retV = { a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, a.x * b.y - a.y * b.x };

    return retV;
}

int main (int argc, char **argv)
{

    Vector3 tstV1 = {1.0,0.0,0.0};
    Vector3 tstV2 = {0.0,1.0,0.0};
    Vector3 tstV3 = {1.0,1.0,1.0};


    printVector(vectCrossProduct(tstV1,tstV2));
    printVector(vectCrossProduct(tstV1,tstV3));
    printVector(vectCrossProduct(tstV2,tstV3));
    printf("\n");


return 0;
}

/*
output:

0.000000 0.000000 1.000000
0.000000 -1.000000 1.000000
1.000000 0.000000 -1.000000

*/