Write ac++ that swaps two numbers using atemporary or third variable , the output shoyld be as below for anum1=5 and num2=8 ???

Question

before swaping
value of num1 is 5
value of num is 8

after swaping
value of num1 is 8
value of num2 is 5

2) re_type the program to swap the value without using athird variable ??

Answer 1

You need to pass your variables by reference to the function to modify them directly inside it.

void swap(int &a, int &b) {
int temp = a;
a = b;
b = temp;
}

void swap2(int &a, int &b) {
a = a + b;
b = a - b;
a = a - b;
}