explain difference between these 2 codes

Question

#include <iostream>
using namespace std;

void myFunc(int *x) {
*x = 100;
}

int main() {
int var = 20;
myFunc(&var);
cout << var;
}

and.....

#include <iostream>
using namespace std;

//diffrent point &
void myFunc(int &x) {
x = 100;
}

int main() {
int var = 20;
myFunc(var); //different point var
cout << var;
}
;)

Answer 1

In the 1st code you pass a pointer, in the 2nd code you pass a reference. They behave a bit different. As you can see by passing a reference you can directly access the value without dereferencing (*x = 100 in 1st code). But you can't iterate a reference, whereas you can iterate a pointer (so that it points to the next memory block)
here is an article about the differences and a short guideline when to use what kind of passing a memory address:
https://www.geeksforgeeks.org/passing-by-pointer-vs-passing-by-reference-in-c/

Answer 2

thanks for your time! explaining this

Answer 3

who the hell downvoted this?😣😣😷🤒😔

Answer 4

I guess it was someone who thinks it makes me sad. Maybe this person was sad because I didn't do his homework for him. Good that I don't care if someone dislikes my posts or codes. I'm happy when someone corrects my mistakes, but I couldn't care less about someone downvoting me for no reason at all.

Answer 5

🗿good thoughts🤗

Answer 6

You're welcome. That was actually a good question, since the difference is not really clear.