1 files changed, 23 insertions, 0 deletions
diff --git a/6.4/getch.c b/6.4/getch.c
new file mode 100644
index 0000000..f271434
--- /dev/null
+++ b/6.4/getch.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <error.h>
+#include <errno.h>
+#include "getch.h"
+
+#define MAXBUFF 100
+
+int top;
+char buff[MAXBUFF];
+
+char getch(void)
+{
+	return (top > 0) ? buff[--top] : getchar();
+}
+
+void ungetch(char c)
+{
+	if (top < MAXBUFF)
+		buff[top++] = c;
+	else
+	 	error(EXIT_FAILURE, ENOBUFS, "getch");
+}