Pass by Value, Reference, Address

Here are two examples. reference^[1]

pass by value

void passByValue(int n) {
	n = 12;
}

int main() {
	int n = 10;
	passbyValue(n);
	printf("n = %d\n", n); // output 10
}

pass by address

voiod passByAddress(int *p) {
	*p = 12;
}

void main() {
	int n = 10;
	passByAddress(&n);
	printf("n = %d\n", n); // output 12
}

pass by reference

Any passed variables, for example n, will be affected both in inner funtion and outer function.

void passByReference(int & n) {
	n = 12;
}

void main() {
	int n = 10;
	passByReference(n);
	printf("n = %d", n); // output 12
}

comparasion

security