Please help. Why numbers don't swap?

Question

https://code.sololearn.com/c3g88T6p4eFh/?ref=app

Answer 1

Георгий Чуйко you can swap two numbers without using a temporary or third variable if you can store the sum of numbers in one number and then minus the sum with other number something like:

a = 3;
b = 5;

a = a + b; // 8
b = a - b;  // 3
a = a - b;  // 5

a = a + b;
b = a - b; // actually (a + b) - (b),
                // so now b is equal to a.
a = a - b; // (a + b) - (a),
                // now a is equal to b.
Now you have a = 5 and b = 3, so numbers are swapped without using a third or temp variable.

Answer 2

Георгий Чуйко Also,
Check this out 😉
• https://code.sololearn.com/c3Aw9gjvvR3p/?ref=app
• https://code.sololearn.com/c24Tb04EO0PQ/?ref=app
• https://code.sololearn.com/c4L8H25Q4zvh/?ref=app

Answer 3

Use this

int x = 5;
int y = 6;
int swap;
SOPln("input" + x "and" + y);
//Swapping part
swap=a;
a=b;
b=swap;
SOPln("output" + x + "and" + y);
//end

Answer 4

Thanks