#include <stdio.h>
int swap_number(int number[2])
{
int temp;
temp = number[0];
number[0] = number[1];
number[1] = temp;
}
int main(void)
{
int num[2] = {10, 20};
swap_number(num);
printf("%d %d\n", num
[0], num
[1]);
return 0;
}
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