/in/foo.cc:2:23: error: 'sum' has not been declared
 int gethe(int m,int n,sum s);
                       ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:28:27: error: invalid conversion from 'sum*' to 'int' [-fpermissive]
  {if(2*s[i].h<=gethe(i,n,s))
                           ^
/in/foo.cc:2:5: note:   initializing argument 3 of 'int gethe(int, int, int)'
 int gethe(int m,int n,sum s);
     ^~~~~
/in/foo.cc: In function 'int gethe(int, int, sum)':
/in/foo.cc:42:17: error: no match for 'operator[]' (operand types are 'sum' and 'int')
  count=count+2*s[i].k;
                 ^