How to write a function that interchanges two values of type int in Visual Studio?

I need a function written in visual studio using c++ that interchanges two values of type int. Also i need to write a driver program to test my function.

How to write a function that interchanges two values of type int in Visual Studio?
int valuechage(int a, int b, int c)


{


a = 1;


b = 3;





c = b;


a = b;


b = a;





return 0;


}
Reply:For interchanging values of two variables from within a function, you should be using either reference variables or pointer.


Using reference variable:-


/*---------------------------------*/


void change(int %26amp;a, int %26amp;b)


{


int c = a;


a = b;


b = c;


return;


}


int main()


{


int a = 10;


int b = 20;


cout %26lt;%26lt; "Original" %26lt;%26lt; endl;


cout %26lt;%26lt; "a: " %26lt;%26lt; a %26lt;%26lt; endl;


cout %26lt;%26lt; "b: " %26lt;%26lt; b %26lt;%26lt; endl;


change(a,b);


cout %26lt;%26lt; "Modified" %26lt;%26lt; endl;


cout %26lt;%26lt; "a: " %26lt;%26lt; a %26lt;%26lt; endl;


cout %26lt;%26lt; "b: " %26lt;%26lt; b %26lt;%26lt; endl;


}


/*---------------------------------*/





Using pointer:-


/*---------------------------------*/


void change(int *a, int *b)


{


int c = *a;


*a = *b;


*b = *c;


return;


}


int main()


{


int a = 10;


int b = 20;


cout %26lt;%26lt; "Original" %26lt;%26lt; endl;


cout %26lt;%26lt; "a: " %26lt;%26lt; a %26lt;%26lt; endl;


cout %26lt;%26lt; "b: " %26lt;%26lt; b %26lt;%26lt; endl;


change(%26amp;a,%26amp;b);


cout %26lt;%26lt; "Modified" %26lt;%26lt; endl;


cout %26lt;%26lt; "a: " %26lt;%26lt; a %26lt;%26lt; endl;


cout %26lt;%26lt; "b: " %26lt;%26lt; b %26lt;%26lt; endl;


}


/*---------------------------------*/