foo.cc:4:1: error: 'viod' does not name a type; did you mean 'void'?
    4 | viod dd(int m){
      | ^~~~
      | void
foo.cc: In function 'int main()':
foo.cc:15:2: error: 'dd' was not declared in this scope
   15 |  dd(n);
      |  ^~

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