return struct

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

struct point{
int x;
int y;
};

struct rect {
struct point p1;
struct point p2;
};

/*
typedef struct{
    float x;
    float y;
    float z;
}Vert;
*/

typedef struct vert{
    float x;
    float y;
    float z;
}Vert;

struct point testas1(int x, int y)
{
    struct point sP;

    sP.x = x;
    sP.y = y;

    return sP;
}

struct rect testas2()
{
    struct rect sR;

    sR.p1.x = 1;
    sR.p1.y = 2;

    struct point ptl;

    ptl.x=3;
    ptl.y=4;

    sR.p2 = ptl;

    return sR;
}

Vert testas3(float x, float y, float z)
{
    Vert sV;

    sV.x = x;
    sV.y = y;
    sV.z = z;

    return sV;
}

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

    struct point pt;

    struct rect fgr;

    Vert sVrt;

    Vert* pVrt;

    pt = testas1(1, 2);

    printf("%d %d\n", pt.x, pt.y);

    fgr = testas2();

    printf("%d %d %d %d\n", fgr.p1.x, fgr.p1.y, fgr.p2.x, fgr.p2.y);

    sVrt = testas3( 0.1 , 0.2 , 0.3 );

    printf("%f %f %f\n", sVrt.x, sVrt.y, sVrt.z);

    printf("sizeof(float):\t%zu\n", sizeof(float));
    printf("sizeof(Vert):\t%zu\n", sizeof(Vert));

    pVrt = malloc(sizeof(Vert));

    if(pVrt != NULL)
    {

        *pVrt = testas3( 0.12 , 0.22 , 0.32 );

        printf("%f %f %f\n", pVrt->x, pVrt->y, pVrt->z);

        free(pVrt);
    }
    else printf("memory allocation error.\n");

return 0;
}

/*
output:

1 2
1 2 3 4
0.100000 0.200000 0.300000
sizeof(float):  4
sizeof(Vert):   12
0.120000 0.220000 0.320000

*/