Iata programelul din documentatia de la libgd luat cu copy/paste:
*****************************************************************
/* Bring in gd library functions */
#include "gd.h"
/* Bring in standard I/O so we can output the PNG to a file */
#include <stdio.h>
int main() {
/* Declare the image */
gdImagePtr im;
/* Declare output files */
FILE *pngout, *jpegout;
/* Declare color indexes */
int black;
int white;
/* Allocate the image: 64 pixels across by 64 pixels tall */
im = gdImageCreate(64, 64);
/* Allocate the color black (red, green and blue all minimum).
Since this is the first color in a new image, it will
be the background color. */
black = gdImageColorAllocate(im, 0, 0, 0);
/* Allocate the color white (red, green and blue all maximum). */
white = gdImageColorAllocate(im, 255, 255, 255);
/* Draw a line from the upper left to the lower right,
using white color index. */
gdImageLine(im, 0, 0, 63, 63, white);
/* Open a file for writing. "wb" means "write binary", important
under MSDOS, harmless under Unix. */
pngout = fopen("test.png", "wb");
/* Do the same for a JPEG-format file. */
jpegout = fopen("test.jpg", "wb");
/* Output the image to the disk file in PNG format. */
gdImagePng(im, pngout);
/* Output the same image in JPEG format, using the default
JPEG quality setting. */
gdImageJpeg(im, jpegout, -1);
/* Close the files. */
fclose(pngout);
fclose(jpegout);
/* Destroy the image in memory. */
gdImageDestroy(im);
}
Iata si erorile la compilare
****************************
#gcc gd.cc
/tmp/ccSksL96.o(.text+0x18): In function `main':
: undefined reference to `gdImageCreate'
/tmp/ccSksL96.o(.text+0x2c): In function `main':
: undefined reference to `gdImageColorAllocate'
/tmp/ccSksL96.o(.text+0x49): In function `main':
: undefined reference to `gdImageColorAllocate'
/tmp/ccSksL96.o(.text+0x65): In function `main':
: undefined reference to `gdImageLine'
/tmp/ccSksL96.o(.text+0xa6): In function `main':
: undefined reference to `gdImagePng'
/tmp/ccSksL96.o(.text+0xb9): In function `main':
: undefined reference to `gdImageJpeg'
/tmp/ccSksL96.o(.text+0xe3): In function `main':
: undefined reference to `gdImageDestroy'
/tmp/ccSksL96.o(.eh_frame+0x11): undefined reference to
`__gxx_personality_v0'
collect2: ld returned 1 exit status
Care poate fi explicatia?
Mentionez ca sunt fff. incepator in c
Multumesc anticipat,
Adrian.
