foo.cc: In function 'int main()':
foo.cc:6:11: error: expected ';' before 'int'
    6 |     cin>>n
      |           ^
      |           ;
    7 |     int sum=0,t;
      |     ~~~    
foo.cc:10:8: error: 't' was not declared in this scope
   10 |        t=n%10
      |        ^
foo.cc:14:11: error: 'sum' was not declared in this scope
   14 |     cout<<sum<<endl;
      |           ^~~

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