copy by reference copy by value
main() {
int i = 10, j = 20;
swapThemByVal(i, j);
cout << i << " " << j << endl; // displays 10 20
swapThemByRef(i, j);
cout << i << " " << j << endl; // displays 20 10
...
}
void swapThemByVal(int num1, int num2) {
int temp = num1;
num1 = num2;
num2 = temp;
}
void swapThemByRef(int& num1, int& num2) {
int temp = num1;
num1 = num2;
num2 = temp;
}copy by reference copy by value
main() {
int i = 10, j = 20;
swapThemByVal(i, j);
cout << i << " " << j << endl; // displays 10 20
swapThemByRef(i, j);
cout << i << " " << j << endl; // displays 20 10
...
}
void swapThemByVal(int num1, int num2) {
int temp = num1;
num1 = num2;
num2 = temp;
}
void swapThemByRef(int& num1, int& num2) {
int temp = num1;
num1 = num2;
num2 = temp;
}Copyright © 2021 Codeinu
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