1 files changed, 44 insertions, 0 deletions
diff --git a/challenge-320/ulrich-rieke/cpp/ch-2.cpp b/challenge-320/ulrich-rieke/cpp/ch-2.cpp
new file mode 100755
index 0000000000..9950e4e891
--- /dev/null
+++ b/challenge-320/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,44 @@
+#include <iostream>
+#include <sstream>
+#include <numeric>
+#include <string>
+#include <vector>
+#include <cstdlib>
+
+std::vector<std::string> split( const std::string & text , char delimiter ) {
+   std::vector<std::string> tokens ;
+   std::istringstream istr { text } ;
+   std::string word ;
+   while ( std::getline( istr , word , delimiter ) ) 
+      tokens.push_back( word ) ;
+   return tokens ;
+}
+
+int digitsum( int number ) {
+   int sum = 0 ;
+   while ( number != 0 ) {
+      sum += number % 10 ;
+      number /= 10 ;
+   }
+   return sum ;
+}
+
+int main( ) {
+   std::cout << "Enter some positive integers separated by blanks!\n" ;
+   std::string line ;
+   std::getline( std::cin , line ) ;
+   auto tokens { split( line , ' ' ) } ;
+   std::vector<int> numbers ;
+   for ( auto s : tokens ) 
+      numbers.push_back( std::stoi( s ) ) ;
+   int numbersum = std::accumulate( numbers.begin( ) , numbers.end( ) , 0 ) ;
+   std::vector<int> digitsums ;
+   for ( int n : numbers ) {
+      digitsums.push_back( digitsum( n ) ) ;
+   }
+   int all_digit_sum = std::accumulate( digitsums.begin( ) , digitsums.end( ) , 
+	 0 ) ;
+   std::cout << std::abs( all_digit_sum - numbersum ) << '\n' ;
+   return 0 ;
+}
+