If a=3 and b=2 how can you swap the two values without declaring a third variable in java or c#

Question

code

Answer 1

In Java not with primitive types, and it's not the case of the easy a, b = b, a .... assigning. Create a function that does that.

Answer 2

int a = 3;
int b = 2;
a = a + b; // 5
b = a - b; // 3
a = a - b; // 2

Answer 3

Ah... actually, it might be possible.
I don't think, however, this is what you expected nor useful than using a temporal variable.

int a = 3;
int b = 2;
a = a * 10 + b; // multiplier can be changed
b = a / 10;
a %= 10;

This agly code exactly uses only two variables.
that's all.

Answer 4

my java teacher gave me as a short assignment

Answer 5

int a=3,b=2;
a=a-b; //1
b=a+b; //3
a=b-a; //2

Answer 6

This is veryyy easy... the code is quite perfect.

#include<stdio.h>
int main()
{
int a,b;
scanf("%d%d",&a,&b);
a=a+b;
b=a-b;
a=a-b;
printf("The answer:%d%d",a,b);
return 0;
}

Answer 7

impossibry :)

Answer 8

Temporal variable is necessary.