How Can I Use A Image In Console Application In C++ Using Unix In Background?

When using Linux, you can use the framebuffer[^].

To show an image using the framebuffer:

• Open the framebuffer device (/dev/fbX)
• Get the device information using ioctl calls with FBIOGET_FSCREENINFO and FBIOGET_VSCREENINFO
• If necessary convert the image to the color depth of the framebuffer device (e.g. using the avconv utility)
• Optionally scale the image
• Map the device to memory using mmap
• Copy the image data to the memory returned by mmap
• Close the mapped memory
• Close the device

If you need the image to be shown together with text, you should also draw the text using the framebuffer. Using normal console text output might overwrite parts of the image and may scroll the image out of view.

As library I would suggest Qt which supports multiple output methods including framebuffers.