Potrace problem

#include <iostream>
#include <fstream>
#include <string>
#if __APPLE__
    #include "./lib/potracelib.h"
    #include "./lib/bitmap.h"
    #include "./lib_ubuntu/bitmap_io.h"
    #include "./lib/main.h"
    #include "./lib/backend_dxf.h"
#elif __linux__
    //#include "./lib_ubuntu/potracelib.h"
    extern "C"
    {
    #include "./lib_ubuntu/bitmap.h"
    #include "./lib_ubuntu/bitmap_io.h"
    //#include "./lib_ubuntu/main.h"
    #include "./lib_ubuntu/backend_svg.h"
    #include "./lib_ubuntu/backend_dxf.h"
    //#include  "./lib_ubuntu/backend_pdf.h"
    }
#endif

int main()
{
    std::ofstream myfile;
    myfile.open ("example.eps");
    FILE *bmfile;
    bmfile = fopen("bm.pgm", "wb");

    FILE *my_file = new FILE;
    my_file = fopen("example.svg", "wb");
    int x, y, i;
    potrace_param_t *param = potrace_param_default();
    potrace_bitmap_t *bm = new potrace_bitmap_t;
    potrace_path_t *p = new potrace_path_t;
    potrace_state_t *st = new potrace_state_t;
    imginfo_t *imginfo = new imginfo_t;
    int n, *tag;
    potrace_dpoint_t (*c)[3];
    bm = bm_new(1000, 1000);
    for (y=0; y<1000; y++) {
        for (x=0; x<1000; x++) {
            BM_PUT(bm, x, y, ((x*x + y*y*y) % 10000 < 5000) ? 1 : 0);
        }
    }

    //param ->alphamax = 0.0;
    //param ->opticurve =;
    //param ->opttolerance = 0.0;
    //param ->progress =;
    //param ->turdsize = 1000;
    //param ->turnpolicy =;
    bm_writepbm(bmfile, bm);
    fclose(bmfile);
    imginfo->width = 1000;
    imginfo->height = 1000;
    imginfo->pixwidth = 1000;
    imginfo->pixheight = 1000;
    imginfo->lmar = 1;
    imginfo->rmar = 1;
    imginfo->tmar = 1;
    imginfo->bmar = 1;
    imginfo->trans.bb[0] = 1000;
    imginfo->trans.bb[1] = 1000;
    imginfo->trans.orig[0] = 0;
    imginfo->trans.orig[1] = 0;
    imginfo->trans.x[0] = 1;
    imginfo->trans.x[1] = 2;
    imginfo->trans.y[0] = 2;
    imginfo->trans.y[1] = 1;
    imginfo->trans.scalex = 1;
    imginfo->trans.scaley = 1;
    st = potrace_trace(param, bm);
    //bm_free(bm);
    p = st->plist;

    printf("page begin\n");

    //init_ps(my_file);
    page_svg(my_file, p, imginfo);

    printf("%s",potrace_version());
    myfile.close();
    fclose(my_file);
    potrace_state_free(st);
    return 0;
}