(This problem is suitable for use as a laboratory experiment.) In Problem 4.15, when the printing of a sequence is interrupted and later resumed, the sequence continues at the beginning of a new line. It is desired to add cursor movement control functions such that when printing of a sequence is resumed, the characters are printed on a new line, at the same character position where they would have been had the interruption not occurred. Thus, the printed output would appear as follows:

Rearrange the software you prepared in Problem 4.15 so that a third controller routine, C, is entered when interruption occurs. This routine calls program B to print the number sequence. Then, before returning to the interrupted program, the routine issues cursor movement commands as appropriate.

ABC 012...901 0129012...9012...9 2...9012...9 DE...YZ