1 files changed, 54 insertions, 0 deletions
diff --git a/challenge-184/ulrich-rieke/cpp/ch-2.cpp b/challenge-184/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..4f05b42cf2
--- /dev/null
+++ b/challenge-184/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,54 @@
+#include <iostream>
+#include <string>
+#include <vector>
+#include <cctype>
+#include <iterator>
+#include <algorithm>
+
+int main( ) {
+  std::cout << "Please enter lines of letters and digits only, separated by blanks!\n" ;
+  std::cout << "enter <return> to end!\n" ;
+  std::string line ;
+  std::getline( std::cin , line ) ;
+  std::vector<std::string> allInput ;
+  while ( !line.empty( ) ) {
+      allInput.push_back( line ) ;
+      std::getline( std::cin , line ) ;
+  }
+  std::vector<std::vector<int>> allDigits ;
+  std::vector<std::vector<char>> allLetters ;
+  for ( const auto & s : allInput ) {
+      std::vector<int> currentDigits ;
+      std::vector<char> currentLetters ;
+      for ( char c : s ) {
+    if ( std::islower( c ) ) {
+        currentLetters.push_back( c ) ;
+    }
+    if ( std::isdigit( c ) ) {
+        currentDigits.push_back( c ) ;
+    }
+      }
+      if ( currentDigits.size( ) > 0 ) {
+    allDigits.push_back( currentDigits ) ;
+      }
+      if ( currentLetters.size( ) > 0 ) {
+    allLetters.push_back( currentLetters ) ;
+      }
+  }
+  std::cout << '[' ;
+  for ( const auto & sequence : allDigits ) {
+      std::cout << "[ " ;
+      std::copy( sequence.begin( ) , sequence.end( ) , std::ostream_iterator<char>(
+          std::cout , " " )) ;
+      std::cout << "]," ;
+  }
+  std::cout << "] and [" ;
+  for ( const auto & sequence : allLetters ) {
+      std::cout << "[ " ;
+      std::copy( sequence.begin( ) , sequence.end( ) , std::ostream_iterator<char>(
+          std::cout , " " )) ;
+      std::cout << "]," ;
+  }
+  std::cout << ']' << std::endl ;
+  return 0 ;
+}