1 files changed, 45 insertions, 0 deletions
diff --git a/challenge-185/ulrich-rieke/cpp/ch-2.cpp b/challenge-185/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..cc3d7b73ae
--- /dev/null
+++ b/challenge-185/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,45 @@
+#include <iostream>
+#include <string>
+#include <cctype>
+#include <algorithm>
+#include <vector>
+
+std::string substitute( const std::string & word ) {
+  std::string output ;
+  int count = 0 ;
+  int pos = 0 ;
+  while ( count < 4 ) {
+      if (std::isalnum( static_cast<int>(word[ pos ] )) != 0 ) {
+    output.append( "x") ;
+    pos++ ;
+    count++ ;
+      }
+      else {
+    output.append( word.substr( pos, 1 )) ;
+    pos++ ;
+      }
+  }
+  output.append( word.substr( pos )) ;
+  return output ;
+}
+
+int main( ) {
+  std::cout << "Please enter codes with a minimum length of 4!\n" ;
+  std::cout << "Enter an empty string to end!\n" ;
+  std::vector<std::string> allInput ;
+  std::string line ;
+  std::getline( std::cin , line ) ;
+  while ( line.length( ) > 0 ) {
+      allInput.push_back( line ) ;
+      std::getline( std::cin , line ) ;
+  }
+  std::transform( allInput.begin( ) , allInput.end( ) , allInput.begin( ),
+    substitute ) ;
+  for ( auto & s : allInput ) {
+      std::cout << s ;
+      if ( s != allInput.back( ) )
+    std::cout << " , " ;
+  }
+  std::cout << std::endl ;
+  return 0 ;
+}