1 files changed, 28 insertions, 0 deletions
diff --git a/challenge-114/ulrich-rieke/cpp/ch-2.cpp b/challenge-114/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..6f0b4fcb4d
--- /dev/null
+++ b/challenge-114/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,28 @@
+#include <string>
+#include <iostream>
+#include <cstdlib>
+#include <algorithm>
+
+std::string toBinaryString( int n ) {
+  std::string binaryString ;
+  while ( n != 0 ) {
+      int i = n % 2 ;
+      binaryString.append( std::to_string( i )) ;
+      n /= 2 ;
+  }
+  reverse( binaryString.begin( ) , binaryString.end( ) ) ;
+  return binaryString ;
+}
+
+int main( int argc , char * argv[] ) {
+  int n = std::atoi( argv[ 1 ] ) ;
+  std::string numberstring( toBinaryString( n ) ) ;
+  int ones = std::count( numberstring.begin( ) , numberstring.end( ) , '1' ) ;
+  numberstring = toBinaryString( ++n ) ;
+  while ( std::count( numberstring.begin( ) , numberstring.end( ) , '1' ) != ones ) {
+      n++ ;
+      numberstring = toBinaryString( n ) ;
+  }
+  std::cout << n << std::endl ;
+  return 0 ;
+}