foo.cc: In function 'int main()':
foo.cc:17:5: error: 'c' was not declared in this scope
   17 |     c=(i/10%10)+(i/100);
      |     ^
foo.cc:34:6: error: 'n' was not declared in this scope
   34 |   if(n==2)
      |      ^
foo.cc:36:4: error: 'c' was not declared in this scope
   36 |    c=(i/10%10)+(i/100);
      |    ^

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