diff --git a/Practice_03/app03-2.c b/Practice_03/app03-2.c
new file mode 100644
index 0000000..b55e8e9
--- /dev/null
+++ b/Practice_03/app03-2.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main(){
+    int a, b;
+    a = 2, b = 1;
+
+    printf("변경전 => a(%p) = %d, b(%p) = %d\n", &a, a, &b, b);
+
+    int c = a;
+    a = b;
+    b = c;
+
+    printf("변경후 => a(%p) = %d, b(%p) = %d\n", &a, a, &b, b);
+
+    return 0;
+}
\ No newline at end of file