text: /*
    Copyright (c) Microsoft Corporation.  All rights reserved.
  
    Update x->car if x.
  */
  
  #include "slayer.h"
  
  typedef struct cell cell;
  struct cell {
    int car;
    cell* cdr;
  };
  
  int main() {
    cell *x ;
  
    if (x) {
      x->car = x->car * 2 ;
      x->cdr = 0;
    }
    else {
      x = (cell*)malloc(sizeof(cell));
      x->car = 0;
    }
  
    return 0;
  }
  