Thread: Two easy questions about pointers

I have read about pointers but still I have some questions related to them:

1) In the following example, we have a function with a pointer:

int function(char *string, char ch)

I fail to understand * and what's the purpose of that.

2) In this example:


for (int i=4; i>=0; i--) {
printf("%p ", (p+i));
printf("%d ", *(p+i));


What is the purpose of putting a parenthesis? why is needed?

Thank you in advance.

1. Perhaps these links might help: Basic Functions, Part II

2. Did you put the statements into a small program and run it to see the output?

Did you follow the links from the link I provided in my last post in your other topic to the pointer tutorial?

Jim

Originally Posted by JorgeChemE

I have read about pointers but still I have some questions related to them:

1) In the following example, we have a function with a pointer:

int function(char *string, char ch)

I fail to understand * and what's the purpose of that.

Here "string" is a pointer to char. You may need to read a reliable book on C. Such things are described in detail there.

2) In this example:


for (int i=4; i>=0; i--) {
printf("%p ", (p+i));
printf("%d ", *(p+i));


What is the purpose of putting a parenthesis? why is needed?

Thank you in advance.

Look up operator precedence.
*(p+i) is not same as (*p+i).

C Operator Precedence Table