Merge remote-tracking branch 'upstream/master'

1 files changed, 48 insertions, 0 deletions

diff --git a/challenge-211/ulrich-rieke/cpp/ch-1.cpp b/challenge-211/ulrich-rieke/cpp/ch-1.cpp
new file mode 100644
index 0000000000..9065b6c7f0
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+++ b/challenge-211/ulrich-rieke/cpp/ch-1.cpp
@@ -0,0 +1,48 @@
+#include <vector>
+#include <string>
+#include <algorithm>
+#include <iostream>
+
+std::vector<std::string> split( const std::string & startline ,
+      const std::string & sep ) {
+  std::vector<std::string> separated ;
+  std::string::size_type start { 0 } ;
+  std::string::size_type pos ;
+  do {
+      pos = startline.find_first_of( sep , start ) ;
+      separated.push_back( startline.substr(start , pos - start )) ;
+      start = pos + 1 ;
+  } while ( pos != std::string::npos ) ;
+  return separated ;
+}
+
+int main( ) {
+  std::cout << "Enter some matrices with same number of integers, end to end!\n" ;
+  std::string line ;
+  std::vector<std::vector<int>> matrix ;
+  std::vector<int> numberline ;
+  std::getline( std::cin , line ) ;
+  while ( line != "end" ) {
+      std::vector<std::string> numberstrings ( split( line , " " ) ) ;
+      for ( auto s : numberstrings )
+    numberline.push_back( std::stoi( s ) ) ;
+      matrix.push_back( numberline ) ;
+      numberline.clear( ) ;
+      std::cout << "Enter some numbers, end to end!\n" ;
+      std::getline( std::cin , line ) ;
+  }
+  int len = matrix.size( ) ;
+  std::vector<int> diagonals ;
+  for ( int i = 0 ; i < len ; i++ ) {
+      std::vector<int> subline ( *(matrix.begin( ) + i ) ) ;
+      diagonals.push_back( subline[ i ] ) ;
+  }
+  int comparison = *(diagonals.begin( ) ) ;
+  if ( std::all_of( diagonals.begin( ) , diagonals.end( ) , [ comparison ]
+      ( int n ) { return n == comparison ; } ) )
+      std::cout << "true" ;
+  else
+      std::cout << "false" ;
+  std::cout << std::endl ;
+  return 0 ;
+}