foo.cc: In function 'int main()':
foo.cc:72:2: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   72 |  while(start[++i]!='0');//查找初始状态0的位置
      |  ^~~~~
foo.cc:73:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   73 |      sscanf(start,"%d",&n);//字符串转换为整数储存在n中
      |      ^~~~~~
foo.cc:70:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   70 |  scanf("%s",start);//输入初始状态
      |  ~~~~~^~~~~~~~~~~~

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