Merge remote-tracking branch 'upstream/master'

1 files changed, 29 insertions, 0 deletions

diff --git a/challenge-070/ulrich-rieke/cpp/ch-1.cpp b/challenge-070/ulrich-rieke/cpp/ch-1.cpp
new file mode 100644
index 0000000000..721956fde7
--- /dev/null
+++ b/challenge-070/ulrich-rieke/cpp/ch-1.cpp
@@ -0,0 +1,29 @@
+#include <string>
+#include <iostream>
+#include <cstdlib>
+
+void swapLetters( std::string & word, int firstPos, int secondPos ) {
+  std::string temp( word.substr( secondPos , 1 ) ) ;
+  int len = word.length( ) ;
+  if ( secondPos < len - 1 )
+      word = word.substr( 0 , secondPos ) + word.substr( firstPos, 1 )
+    + word.substr( secondPos + 1 ) ;
+  else
+      word = word.substr( 0 , secondPos )  + word.substr( firstPos, 1 ) ;
+  if ( firstPos > 0 )
+      word = word.substr( 0 , firstPos ) + temp + word.substr( firstPos
+        + 1 ) ;
+  else
+      word = temp + word.substr( firstPos + 1 ) ;
+}
+
+int main( int argc, char * argv[] ) {
+  std::string word( argv[ 1 ] ) ;
+  int c = std::atoi( argv[ 2 ] ) ;
+  int o = std::atoi( argv[ 3 ] ) ;
+  int n = word.length( ) ;
+  for ( int i = 1 ; i < c + 1 ; i++ )
+      swapLetters( word , i % n , ( i + o ) % n ) ;
+  std::cout << word << std::endl ;
+  return 0 ;
+}