헤드 퍼스트 C 2강

#include <stdio.h>

int main()
{
char cards[] = "JQK";
char a_card = cards[2];
cards[2] = cards[1];
cards[1] = cards[0];
cards[0] = cards[2];
cards[2] = cards[1];
cards[1] = a_card;
puts(cards);

return 0;
}