View Compilation Error

0_0_39031832_25653.cpp: In function 'int main()':
0_0_39031832_25653.cpp:6:6: error: '_max' was not declared in this scope; did you mean 'fmax'?
    6 | {    _max, ans;        //dp:保存当前状态和上一次状态的最大值
      |      ^~~~
      |      fmax
0_0_39031832_25653.cpp:6:12: error: 'ans' was not declared in this scope; did you mean 'abs'?
    6 | {    _max, ans;        //dp:保存当前状态和上一次状态的最大值
      |            ^~~
      |            abs