function are not working but no error in program

I have a project using linked list.In complete program there show no error.In the program i have several user choice first when user input some data it takes.and after the end of input it back on main choice option page.But when user ask for show option for see input data s,show page came with correct inputs element but it doesn’t stay, it gone in less than a m second and back to the main page(I do not use call main function in show function). what may cause for this back in main page.

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