addm.dsc

这是个很好的源代码,有用的

An addition program with left-side-marker of the tape.

The program adds two numbers. 
A number 'n' is represented by n 1-s.
Sample :
  5 is represented as  1 1 1 1 1
  3 is represented as  1 1 1      

Input : Two numbers separated by symbol '*'
Sample :
  1 1 1 1 1 * 1 1 1

Output : Resulting number (without '*') preceded by left-side-marker
Sample :
  x 1 1 1 1 1 1 1 1