feat: update structure

cs2106/labs/lab1/part2/lab1p2a.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+
+int *p1, *p2, *p3, *p4;
+
+void fun1(int x, int y) {
+
+    static int w;
+    int z;
+    w = x * y;
+    z = x + y;
+
+    printf("Inside fun1\n");
+    p1 = &w;
+    p2 = &x;
+    p3 = &y;
+    p4 = &z;
+    printf("Address of p1 = %p, address of p2 = %p, address of p3 = %p, address of p4 = %p\n", &p1, &p2, &p3, &p4);
+    printf("Address of w = %p, address of x = %p, address of y = %p, address of z = %p\n", p1, p2, p3, p4);
+    printf("w = %d, x = %d, y = %d, z = %d\n", w, x, y, z);
+}
+
+
+int fun2(int f, int g, int h) {
+    printf("\nInside fun2\n");
+    printf("w = %d, x = %d, y = %d, z = %d\n", *p1, *p2, *p3, *p4);
+    return f + g + h;
+}
+
+int main() {
+
+    int a = 5, b = 6, c;
+
+    fun1(a, b);
+
+    printf("\nOutside fun1\n");
+    printf("w = %d, x = %d, y = %d, z = %d\n", *p1, *p2, *p3, *p4);
+
+    fun2(1, 2, 3);
+    printf("\nOutside fun2\n");
+    printf("w = %d, x = %d, y = %d, z = %d\n", *p1, *p2, *p3, *p4);
+}