Started into the Expression and Operand obejcts.

__call.cpp

@@ -1,4 +1,4 @@
-#include "__system.h"
+#include "__call.h"
 #include "Exception.h"
 #include "MString.h"
 #include <stdlib.h>
@@ -8,7 +8,7 @@
 
 namespace jet {
    
-   __system::__system(coreutils::ZString &in, coreutils::MString &out, Global &global) : Tag(in, out, global) {
+   __call::__call(coreutils::ZString &in, coreutils::MString &out, Global &global) : Tag(in, out, global) {
       if(hasContainer)
 	throw coreutils::Exception("call cannot have a container.");	
       if(!variableDefined(coreutils::ZString("pgm")))
@@ -51,7 +51,6 @@ namespace jet {
       else 
 	out.read(fdo[0]);               
       waitpid(pid, &status, 0);
-      std::cout << "status: " << status << std::endl;
    }
    
 }