Example 1 - Homework 1, Problem 2
 1  void op1(int a, int b) {
 2      a = a + b;
 3  }
 4  
 5  void op2(int* a, int* b) {
 6      *a = *a + *b;
 7  }
 8
 9  int main() {
10     int a = 1, b = 1, c = 1, d = 1;
11     op1(a, b);
12     op2(&c, &d);
13     return 0;
14  }


Example 2 - Homework 1, Problem 4
 1  int a[5];
 2 
 3  a[0] = 0;
 4  a[1] = 10; 
 5  a[2] = 100;
 6  
 7  //COMMENT 1
 8  
 9  a[3] = *a + 2;
10  a[4] = *(a + 2); 
11  
12  //COMMENT 2


Example 3:
  1  struct bar {
  2      int k;
  3  };
  4  
  5  struct foo {
  6      int a;
  7      struct bar b;
  8  };
  9      
 10  int main() {
 11      const int NFOO = 5;
 12      struct foo foo_array[NFOO];
 13      struct foo* foo_p = 0;
 14      int i = 0;
 15      
 16      for (; i < NFOO; ++i) {
 17          foo_array[i].a = i;
 18          foo_array[i].b.k = 0;
 19          foo_p = &foo_array[i];
 20          if (foo_p->a > 2) {
 21              foo_p->b.k = 10;
 22          }
 23          printf("%d %d\n", foo_p->a, foo_p->b.k);
 24      }       
 25          
 26      return 0;
 27  }


Example 4:
 1  struct item {
 2      int price;
 3      int quantity;
 4  };
 5  
 6  int compute_total_price(struct item i) {
 7      return i.price * i.quantity;
 8  }
 9  
10  void double_quantity(struct item i) {
11      i.quantity *= 2;
12  }
13  
14  void double_price(struct item* i) {
15      i->price *= 2;
16  }
17  
18  int main() {
19      struct item my_item;
20      my_item.price = 25; 
21      my_item.quantity = 100;
22      printf("%d\n", compute_total_price(my_item));
23
24      double_quantity(my_item);
25      printf("%d\n", compute_total_price(my_item));
26  
27      double_price(&my_item);
28      printf("%d\n", compute_total_price(my_item));
29  
30      return 0;
31  }