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  1. #include <iterator>
  2. #include <iostream>
  3.  
  4. int sum(int* a, unsigned size, int acc = 0)
  5. {
  6.    if ( size == 0 )
  7.       return acc ;
  8.    else
  9.       return sum(a+1, size-1, acc + *a);
  10. }
  11.  
  12. int main()
  13. {
  14.    int array[] = { 1, 2, 3, 4, 5, 6 } ;
  15.    unsigned array_size = std::end(array) - std::begin(array) ;
  16.  
  17.    std::cout << sum(array, array_size) << " is the sum of elements in array.\n" ;
  18. }
Success #stdin #stdout 0s 3296KB
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Standard input is empty
stdout
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21 is the sum of elements in array.
https://ideone.com/C08jQ0
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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