1 files changed, 20 insertions, 0 deletions
diff --git a/challenge-185/ulrich-rieke/cpp/ch-1.cpp b/challenge-185/ulrich-rieke/cpp/ch-1.cpp
new file mode 100644
index 0000000000..244b482591
--- /dev/null
+++ b/challenge-185/ulrich-rieke/cpp/ch-1.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+#include <string>
+
+int main( ) {
+  std::cout << "Please enter a MAC address in the form hhhh.hhhh.hhhh!\n" ;
+  std::string address ;
+  std::getline( std::cin , address ) ;
+  int pos = 0 ;
+  std::string output ;
+  while ( pos < address.length( ) - 2 ) {
+      output.append( address.substr( pos , 2 )) ;
+      output.append( ":" ) ;
+      pos += 2 ;
+      if ( address.substr( pos , 1 ) == "." )
+    pos++ ;
+  }
+  //take the output substr because we want to leave out the final ':'
+  std::cout << output.substr(0 , output.length( ) - 1 ) << std::endl ;
+  return 0 ;
+}