5. Other Exercises

Additional exercises from the book:

4. Write a simple program that allocates memory using malloc() but forgets to free it before exiting. What happens when this program runs? Can you use gdb to find any problems with it? How about valgrind (again with the --leak-check=yes flag)?

5. Write a program that creates an array of integers called data of size 100 using malloc; then, set data[100] to zero. What happens when you run this program? What happens when you run this program using valgrind? Is the program correct?

6. Create a program that allocates an array of integers (as above), frees them, and then tries to print the value of one of the elements of the array. Does the program run? What happens when you use valgrind on it?

7. Now pass a funny value to free (e.g., a pointer in the middle of the array you allocated above). What happens? Do you need tools to find this type of problem?