1 files changed, 11 insertions, 0 deletions
diff --git a/libraries/euler/cctype.cpp b/libraries/euler/cctype.cpp
new file mode 100644
index 0000000..98234bb
--- /dev/null
+++ b/libraries/euler/cctype.cpp
@@ -0,0 +1,11 @@
+#include <cctype>
+
+namespace std {
+
+  int isspace(int ch) {
+    return
+      ch == ' ' || ch == '\n' || ch == '\t' ||
+      ch == '\r' || ch == '\v' || ch == '\f';
+  }
+
+}