C: categorize files, update .gitignore

c-programming/strings/asprintf.h

@@ -0,0 +1,17 @@
+/*
+ * asprintf.h
+ *
+ * Author: Intel A80486DX2-66
+ * License: Creative Commons Zero 1.0 Universal
+ */
+
+#ifndef _ASPRINTF_H
+#define _ASPRINTF_H
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+ssize_t asprintf(char** strp, char* format, ...);
+
+#endif /* _ASPRINTF_H */