linux c 编译 pdf

#include <hpdf.h>
#include <stdio.h>

void error_handler(HPDF_STATUS error_no, HPDF_STATUS detail_no, void *user_data) {
    printf("ERROR: error_no=%04X, detail_no=%d\n", (unsigned int)error_no, (int)detail_no);
}

int main() {
    HPDF_Doc pdf;
    HPDF_Page page;
    HPDF_Font font;
    HPDF_REAL tw;

    pdf = HPDF_New(error_handler, NULL);
    if (!pdf) {
        printf("Unable to create PDF object.\n");
        return 1;
    }

    page = HPDF_AddPage(pdf);

    font = HPDF_GetFont(pdf, "Helvetica", NULL);
    tw = HPDF_Page_TextWidth(page, font, 12, "Hello World");

    HPDF_Page_BeginText(page);
    HPDF_Page_MoveTextPos(page, (HPDF_Page_GetWidth(page) - tw) / 2, (HPDF_Page_GetHeight(page) - 12) / 2);
    HPDF_Page_ShowText(page, "Hello World");
    HPDF_Page_EndText(page);

    HPDF_SaveToFile(pdf, "hello.pdf");

    HPDF_Free(pdf);

    return 0;
}

gcc -o hello hello.c -lhpdf

./hello