foo.cc: In function 'int main()':
foo.cc:4:2: error: 'undefined' was not declared in this scope
    4 | {undefined
      |  ^~~~~~~~~
foo.cc:6:10: error: 'n' was not declared in this scope
    6 |     cin>>n;
      |          ^
foo.cc:7:9: error: 'i' was not declared in this scope
    7 |     for(i=1;i<=n;i++)
      |         ^
foo.cc:9:9: error: 's' was not declared in this scope
    9 |         s=i/10;
      |         ^
foo.cc:10:9: error: 'g' was not declared in this scope
   10 |         g=i%10;
      |         ^
foo.cc:12:9: error: 'sum' was not declared in this scope
   12 |         sum=sum+i*i;
      |         ^~~
foo.cc:14:10: error: 'sum' was not declared in this scope
   14 |    cout<<sum;
      |          ^~~

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