display image when received

Hi everyone, I wrote TCP/IP socket programming in c to transfer image from client to server. My program sent image from client to server. After it sent, it saved image first. So if i wanna see the image, I have to go to the directory where it save and open it.for me, I wanna display image in full screen since i receive. How can I do it? If anyone know how to do it, pls kindly share me. Thanks. By the way, I am using ubuntu 11.10. Thanks
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