foo.cc:5:1: error: '::main' must return 'int'
    5 | void main(){
      | ^~~~
foo.cc: In function 'int main()':
foo.cc:8:63: warning: right operand of comma operator has no effect [-Wunused-value]
    8 |                 cout<<"Only %02d:%02d.  Too early to Dang.",h,m;
      |                                                               ^
foo.cc:8:64: warning: right operand of comma operator has no effect [-Wunused-value]
    8 |                 cout<<"Only %02d:%02d.  Too early to Dang.",h,m;
      |                                                                ^

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