Say if my output screen have five lines, how would I do a line up and a line down without printing it out all over? For example, if my current display is:
        1                                                    2                                        1
        2                                                    3                                        2
        3      ->  perform one line down        4    -> perform on line up     3
        4                                                    5                                        4
        5                                                    6                                        5

Is this possible without gui?

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U can use gotoxy() to set the cursor's current position
For borland compilers,its defined under conio.h

FOR vc++,u can write ur own:
gotoxy(int,int) is called with 2 integer parameters,first is the column number starting from 1
and the second is the row number starting from 1.

gotoxy(1,12);//1st col. and 12th row
//some other statements
gotoxy(1,12);//1st col. and 12th row

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what u can do is:
use gotoxy() and printf() and shift each value up one row and then  add the last value.
and shift each value down one row and add one value at the top.
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