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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct node {
  5.     int info;
  6.     node *next;
  7. };
  8.  
  9. int Sum_Even_Values(node *head)
  10. {
  11.     int sum = 0;
  12.     if (head) {
  13.         if ((head->info % 2) == 0) {
  14.             cout << " + " << head->info;
  15.             sum = head->info;
  16.         }
  17.         sum += Sum_Even_Values(head->next);
  18.     }
  19.     return sum;
  20. }
  21.  
  22. int main() {
  23.     // ignore that the nodes are on the stack instead of the heap,
  24.     // this is just for demonstration purposes, how the nodes are
  25.     // allocated is irrelevant...
  26.     node nodes[10];
  27.     for(int i = 0; i < 10; ++i) {
  28.         nodes[i].info = i+1;
  29.         nodes[i].next = &nodes[i+1];
  30.     }
  31.     nodes[9].next = 0;
  32.  
  33.     int sum = Sum_Even_Values(nodes);
  34.     cout << " = " << sum;
  35.  
  36.     return 0;
  37. }
Success #stdin #stdout 0s 4216KB
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Standard input is empty
stdout
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 + 2 + 4 + 6 + 8 + 10 = 30
https://ideone.com/IK1Rkw
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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