How to swap integer values without using a function in C++?

[SubhanUllah]

int a = 6; 
int b = 2; 
std::cout << "a=" << a << " b=" << b << "\n"; 
int temp = a; 
a = b; 
b = temp; 
std::cout << "a=" << a << " b=" << b << "\n";

 

[gugtenterf]

On 10/31/2022 at 9:31 AM, SubhanUllah said:

int a = 6; 
int b = 2; 
std::cout << "a=" << a << " b=" << b << "\n"; 
int temp = a; 
a = b; 
b = temp; 
std::cout << "a=" << a << " b=" << b << "\n";

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This code swaps the values of the variables a and b using a temporary variable called temp. Here's how the code works step by step:

 

1. The value 6 is assigned to the variable a, and the value 2 is assigned to the variable b.
2. The std::cout statement outputs the values of a and b to the console.
3. The value of a (which is 6) is assigned to the temporary variable temp.
4. The value of b (which is 2) is assigned to a.
5. The value of temp (which is 6) is assigned to b.
6. The second std::cout statement outputs the new values of a and b to the console, which will be 2 and 6, respectively.

So, after the code is executed, the values of a and b have been swapped, with a now equal to the original value of b and b now equal to the original value of a.