QQ p436 null 쓰레기값

#include <stdio.h>

int main(void)
{
	char str1[5] = "AAA";
	char str2[ ] = "BBB";
	char str3[ ] = { 'A', 'B', 'C'};
	char str4[] = { 'A', 'B', 'C', '\0'};

	printf("str1 : %s \n", str1);
	printf("str2 : %s \n", str2);
	printf("str3 : %s \n", str3);
	printf("str4 : %s \n", str4);

	str1[0] = 'C';
	str1[1] = 'B';
	printf("str1 : %s \n", str1);
		
	return 0;
}