Answer / nipun

You can use while loop for this. Insert your code for screen
A in the while loop and just let it run if the user enters
a 'Y' and if the user choses 'N' then go to screen B out of
the loop

Or
you can use label:
ex:
main()
{
code....
......

label:
code for screen A...
......
......
printf("Another Entry? [Y] or [N] :");
scanf("%s", &op);
if(choice=='y' || choice=='Y')
{
goto label;
}
}

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