#include <stdio.h>
#include "Expr.h"

int main ( void ) {
  Expr e6 = exprInt(6);
  Expr e7 = exprInt(7);
  Expr answer = exprBin("*",e6,e7);
  printf("answer = %ld\n", exprEval( answer ));
  printf("  ...     %ld\n", exprEval( exprBin("+", answer, exprInt(14)) ));
  Expr eX = exprVar("x");
  printf("answer = %ld\n", exprEval( exprBin("-", answer, eX) ));
  return 0;
}