new file = main.c and modified hex_read_scanf.c removed main from hex_read_scanf.c

c-basic/hex_read_scanf.c

@@ -1,6 +1,6 @@
 #include <stdio.h>
 
-int main()
+int hex_scan()
 {
 
   int a, b;

c-basic/main.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include "hex_read_scanf.c"
+
+int main()
+{
+
+  hex_scan();
+
+  return 0;
+}