1 files changed, 26 insertions, 0 deletions
diff --git a/io.h b/io.h
new file mode 100644
index 0000000..161728a
--- /dev/null
+++ b/io.h
@@ -0,0 +1,26 @@
+#ifndef IO_H
+#define IO_H
+
+#include <stdint.h>
+
+// putchar() and getchar() are not part of io.c, but it's useful to
+// have those symbols declared here
+void putchar(char c);
+
+char getchar(void);
+
+void puts(char string[]);
+
+void prints(char string[]);
+
+void printdec(uint32_t number);
+
+void printhex(uint32_t number);
+
+void printbin(uint32_t number);
+
+void printdect(uint32_t number);
+
+void printhext(uint32_t number);
+
+#endif // IO_H