started hacking some experimental code

c-basic/foo.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int foo()
+{
+  printf("I am foo\n");
+}
+
+int main()
+{
+  foo();
+  return 0;
+}

c-basic/printf.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main()
+{
+  int a = 10, b = 20;
+
+  printf("a = %d, b= %d\n", a, b);
+  printf("a = %d, b = %d\n", b, a);
+  printf("%d%d", a, b);
+
+  return 0;
+}