diff --git a/pointer.c b/pointer.c
new file mode 100644
index 0000000..126b2d2
--- /dev/null
+++ b/pointer.c
@@ -0,0 +1,10 @@
+#include<stdio.h>
+
+int
+main() {
+	float a[] = { 1.0, 2.0 };
+	float* p = a;
+	printf("size pointer %d", sizeof(p));
+	printf("size float %d", sizeof(*p));
+	printf("%f", *(++p));
+}