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fix documentation for double_factorial

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Krishna Vedala 2020-05-27 12:55:03 -04:00
parent 44f68e9a2e
commit 50070774dd
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1 changed files with 3 additions and 2 deletions
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math/double_factorial.cpp
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@ -2,7 +2,8 @@
* @file
* Double factorial of a non-negative integer n, is defined as the product of
* all the integers from 1 to n that have the same parity (odd or even) as n.
* <br/>It is also called as semifactorial of a number and is denoted by `!!`
* <br/>It is also called as semifactorial of a number and is denoted by
* \f$n!!\f$
*/
#include <cassert>
@ -27,7 +28,7 @@ uint64_t double_factorial_recursive(uint64_t n) {
/// main function
int main() {
uint64_t n{};
uint64_t n;
std::cin >> n;
assert(n >= 0);
std::cout << double_factorial_iterative(n);