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#include <stdio.h>
int main()
{
int a = 5;
int b = 5;
printf("a: %d, b: %d \n", a, b);
swap(&a, &b);
printf("after swap \n");
printf("a: %d, b: %d", a, b);
return 0;
}
void swap(int *a, int *b) {
*a ^= *b;
*b ^= *a;
*a ^= *b;
}