vi ch-2Merge remote-tracking branch 'upstream/master'

1 files changed, 34 insertions, 0 deletions

diff --git a/challenge-153/ulrich-rieke/cpp/ch-2.cpp b/challenge-153/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..51fd65fda0
--- /dev/null
+++ b/challenge-153/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,34 @@
+#include <iostream>
+#include <cstdlib>
+#include <vector>
+#include <algorithm>
+#include <numeric>
+
+int factorial( int num ) {
+  if ( num == 0 ) {
+      return 1 ;
+  }
+  else {
+      int fac = 1 ;
+      for ( int i = 1 ; i < num + 1 ; i++ )
+    fac *= i ;
+      return fac ;
+  }
+}
+
+int main( int argc, char* argv[] ) {
+  int n = std::atoi( argv[1] ) ;
+  int c = n ; //we are "destroying" n in the next lines
+  std::vector<int> digits ;
+  while ( n != 0 ) {
+      digits.push_back( n % 10 ) ;
+      n /= 10 ;
+  }
+  std::transform( digits.begin( ) , digits.end( ) , digits.begin( ) ,
+    factorial ) ;
+  if ( std::accumulate( digits.begin( ) , digits.end( ) , 0 ) == c )
+      std::cout << 1 << std::endl ;
+  else
+      std::cout << 0 << std::endl ;
+  return 0 ;
+}