TEAM ZERO + 

Test Cases

// VarDecl, Assign, and IntExpr
{
  int a
  int b
  b=3
  a = 3 + 5 + b
}

// Print and CharExpr
{
  char a
  a = "string"
  print(a)
}

// If Expression
{
   int b
   b = 4
   int a
   a = b
   if (a==b) then
   {
      print(a)
   }
   print(b)
}

// While Expression
{
   int b
   b = 4
   int a
   a= b
   while (a==b)
   {
       print (a)
       a = 1 + a
   }
}

// Scope
{
  int b
  b= 4
  int a
  a = b
  if (a==b) then
  {
    {
      char a
      a = "a char"
      print ("a is")
      print (a)
    }
  }
  print(b)
}

// Multipass While loop
{
  int a
  a = 0
  int b
  b=0
  while (a==0)
  {
    print (b)
    b = 1+b
    if (b==3) then
    {
      a = 1
    }
  }
}