foo.cc: In function 'int main()':
foo.cc:40:9: error: 'setw' was not declared in this scope; did you mean 'getw'?
   40 |   cout<<setw(4)<<right<<m[i][0]<<setw(4)<<right<<m[i][1]<<setw(4)<<right<<m[i][2]<<endl;
      |         ^~~~
      |         getw

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