I have a question

Question

We have two variables. a and b. Can you change the values ​​of a b and c like example without using another variable?

Ex:
a = 10
b = 5
c = 7
>> Run
a = 7
b = 10
c = 5

a -> b
b -> c
c -> a

Answer 1

ofc you can. thing of swapping only two of them first and then one of them with the third. If you cant get your head around, I am more than ready to help ;)

Answer 2

#include <stdio.h>
void cyclicSwap(int* a, int* b, int* c)
{
// Before overwriting b, store its 
// value in temp.
int temp = *a;
// Now do required swapping starting
  // with b.
*a = *b;
*b = *c;
*c = temp;
}
int main()
{
int a = 10, b = 5, c = 7;
printf("Value before swapping:\n");
printf("a = %d \nb = %d \nc = %d\n", a, b, c);
cyclicSwap(&a, &b, &c);
 printf("Value after swapping:\n");
 printf("a = %d \nb = %d \nc = %d", a, b, c);
return 0;
}