STEP Example 1

STEP Programming Example 1:

An example XML STEP is given further below, “compiled” from the SNAFU fragment:
   trigger(equals(4,rand(0,5)),add(2,8))

which is equivalent to the C++ fragment:
   while(!(rand(0,5)==4))
      {};
   return (2+8);

The SNAFU program above would compile into the following STEP program. (Note the id's assigned to nodes are entirely arbitrary).
<stepgraph id="id1">
   <trigger id="TriggerHead">
       <exp id="equals" opcode="sxe.core.equals">
           <value id="3">
               <snobject type="snbench/integer">4</snobject>
           </value>
           <exp id="rand" opcode="sxe.core.math.random">
               <value id="1">
                   <snobject type="snbench/integer">0</snobject>
               </value>
               <value id="2">
                   <snobject type="snbench/integer">5</snobject>
               </value>
           </exp>
       </exp>
       <exp id="add" opcode="sxe.core.math.add">
           <value id="4">
               <snobject type="snbench/integer">2</snobject>
           </value>
           <value id="5">
               <snobject type="snbench/integer">8</snobject>
           </value>
       </exp>
   </trigger>
</stepgraph>

Michael Ocean (mocean@cs.bu.edu)
Creation Date: 1/10/06
Last Change: 1/12/06