- Added solutions by Paulo Custodio.

- Added solutions by Peter Campbell Smith.
- Added solutions by Robert Ransbottom.
- Added solutions by Feng Chang.
- Added solutions by PokGoPun.
- Added solutions by Peter Pentchev.
- Added solutions by Santiago Leyva.
- Added solutions by Robbie Hatley.
- Added solutions by Ulrich Rieke.
- Added solutions by Laurent Rosenfeld.

1 files changed, 22 insertions, 0 deletions

diff --git a/challenge-287/ulrich-rieke/cpp/ch-2.cpp b/challenge-287/ulrich-rieke/cpp/ch-2.cpp
new file mode 100755
index 0000000000..b5dc14d07a
--- /dev/null
+++ b/challenge-287/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,22 @@
+#include <iostream>

+#include <string>

+#include <regex>

+

+int main( ) {

+   std::cout << "Enter a string!\n" ;

+   std::string word ;

+   std::cin >> word ;

+   std::string inte {R"(^[-+]?\d+([eE]?[-+]?\d+)*$)"} ;

+   std::string decifirst {R"(^[-+]?\d+\.([eE]?[-+]?\d+)*$|^[-+]?\d+\.\d+([eE]?[+-]?\d+)*$)"} ;

+   std::string decisecond {R"(^[+-]?\.\d+([eE]?[+-]?\d+$)*$)" } ;

+   std::regex integer( inte ) ;

+   std::regex decimalfirst ( decifirst ) ;

+   std::regex decimalsecond ( decisecond ) ;

+   if ( std::regex_match( word , integer ) || std::regex_match( word , decimalfirst ) ||

+      std::regex_match( word , decimalsecond ) )

+      std::cout << "true" ;

+   else 

+      std::cout << "false" ;

+   std::cout << '\n' ;

+   return 0 ;

+}