Update skeleton

examples/c/struct3.c

@@ -0,0 +1,24 @@
+struct Sub {
+    long m1;
+    long m2;
+    long m3;
+    long m4;
+};
+
+struct Big {
+    struct Sub m1;
+    struct Sub m2;
+    struct Sub m3;
+};
+
+struct Big foo(struct Big p1) {
+    struct Big r = p1;
+    r.m1.m1 = 10;
+    return r;
+}
+
+int main() {
+    struct Big a = {{1, 2, 3, 4}, {2, 3, 4, 5}, {3, 4, 5, 6}};
+    struct Big r = foo(a);
+    return r.m1.m1 == 10;
+}