C Language.

Warm Up

2. Symbol Table:

Name	Type	Address
integer1	int	0x7fff8c1ff994
p1	int *	0x7fff8c1ff988
p2	int **	0x7fff8c1ff980

Memory Chunk (address on the left, data on the right):

0x7fff8c1ff994
0x7fff8c1ff988
0x7fff8c1ff980

Fill in the above memory chunk table to reflect the changes that lines 6, 7, and 8 cause

In we substitute lines 10-12 with the following two statements, then what will be the output of the program?

Will the output be the same if we substitute the above two lines with the following two statements?

Will the output be the same if we substitute the above two lines with the following two statements?

Explain why the above outputs are the same or different from each other.

Consider the following program and answer the questions below.

What does variable p2 represent? Will this program successfully compile without warnings? Why or why not? (Try it!)

Arrays and Pointers

4. Compile and run the following program and answer the corresponding programs.

What is the output of the program?

What does array_of_integers evaluate to? If you dereference it, what value do you get? Try it.

Suppose we change lines 10-11 to the following:

Will the output change? Why or why not?

Suppose we change lines 13-14 of the original program to the following statements:

Will the output change? Why or why not?

Suppose we change lines 10-11 of the original program to the following statements:

Will the output change? Why or why not?

Now, does the variable ptr_of_array have the same value as the variable ptr_of_first_element? Why or why not?

Function and Pointers

What is the output of the following code?

Why? (i.e. show whats going on in memory)

CpSc 1111 Lab 12 Pointers Overview Pointers are an integral part of C and C++. While they may be the cause of many headaches, they allow for a great deal of control and flexibility. Because they are low-level constructs, they require a solid understanding of the memory model behind it all. Not every language has pointers, but what you learn about memory management will apply to most every language. Unlike most of your previous labs this semester, this one will not require you to write and submit a program. This lab is adapted from a lab used elsewhere, and it involves a good amount of guided self-exploration. We'll give you the right questions to ask along the way. Many of the questions will be open-ended, so when answering them, be sure to ask if you are not 100% sure what's going on! Please use the answer sheet provided. You will submit the answer sheet to the handin page. You may work individually or in groups of no more than 3. The code snippets here are screenshots, so you won't be able to copy and paste them (sorry!) but they're short enough to type This lab will give you the opportunity to Understand and use pointers and pointer operations Discover the relationship between arrays and pointers plore passing pointers as functi on parameters Warm Up First, let's practice with pointers to basic C data types and some related pointer operations. We'll see referencing, dereferencing, and arithmetic operations. 1. Compile and run this program: 1 #include 3 int main(int argc, char argvl) 4int integerl, *pl, **p2; 6 integer1 10; 9 10 11 12 13 14 h printf("integer]s%d ", printf("p1= %p ",p1 ) ; printf("p2-%p ",p2); return integer! ) ; 2. Suppose after the declaration of the variables on line 4, we have the following: Symbol Table Name Address 0x7fff8clff994 0x7fff8clff988 0x7fff8clff980 integer int int int* Memory Chunk (address on the left, data on the right): 0x7fff8clff994 0x7fff8clff988 0x7fff8clff980 a. Fill in the above memory chunk table to reflect the changes that lines 6, 7, and 8 cause CpSc 1111 Lab 12 Pointers Overview Pointers are an integral part of C and C++. While they may be the cause of many headaches, they allow for a great deal of control and flexibility. Because they are low-level constructs, they require a solid understanding of the memory model behind it all. Not every language has pointers, but what you learn about memory management will apply to most every language. Unlike most of your previous labs this semester, this one will not require you to write and submit a program. This lab is adapted from a lab used elsewhere, and it involves a good amount of guided self-exploration. We'll give you the right questions to ask along the way. Many of the questions will be open-ended, so when answering them, be sure to ask if you are not 100% sure what's going on! Please use the answer sheet provided. You will submit the answer sheet to the handin page. You may work individually or in groups of no more than 3. The code snippets here are screenshots, so you won't be able to copy and paste them (sorry!) but they're short enough to type This lab will give you the opportunity to Understand and use pointers and pointer operations Discover the relationship between arrays and pointers plore passing pointers as functi on parameters Warm Up First, let's practice with pointers to basic C data types and some related pointer operations. We'll see referencing, dereferencing, and arithmetic operations. 1. Compile and run this program: 1 #include 3 int main(int argc, char argvl) 4int integerl, *pl, **p2; 6 integer1 10; 9 10 11 12 13 14 h printf("integer]s%d ", printf("p1= %p ",p1 ) ; printf("p2-%p ",p2); return integer! ) ; 2. Suppose after the declaration of the variables on line 4, we have the following: Symbol Table Name Address 0x7fff8clff994 0x7fff8clff988 0x7fff8clff980 integer int int int* Memory Chunk (address on the left, data on the right): 0x7fff8clff994 0x7fff8clff988 0x7fff8clff980 a. Fill in the above memory chunk table to reflect the changes that lines 6, 7, and 8 cause