foo.cc: In function 'int run(int)':
foo.cc:17:37: error: 'dy' was not declared in this scope
  else if(cz[a]=='['&&!nc[p]) return dy[a]; //若当前内存数值为0，则跳过循环来到右括号
                                     ^~
foo.cc:17:37: note: suggested alternative: 'd'
  else if(cz[a]=='['&&!nc[p]) return dy[a]; //若当前内存数值为0，则跳过循环来到右括号
                                     ^~
                                     d
foo.cc:18:36: error: 'dy' was not declared in this scope
  else if(cz[a]==']'&&nc[p]) return dy[a]; //若当前内存数值不为0，则回到左括号
                                    ^~
foo.cc:18:36: note: suggested alternative: 'd'
  else if(cz[a]==']'&&nc[p]) return dy[a]; //若当前内存数值不为0，则回到左括号
                                    ^~
                                    d
foo.cc: In function 'int main()':
foo.cc:28:6: warning: unused variable 'tot' [-Wunused-variable]
  int tot=0;
      ^~~

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