#include <stdio.h>
#include <stdlib.h>
int b[5] = {1, 2, 3, 4, 5};
int main() {
int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
printf("%d\n", a[10]);
printf("%d %d\n", sizeof(a), sizeof(a[0]));
printf("%d %d\n", sizeof(b), sizeof(b[0]));
char *s1 = "abcde";
char s2[5] = "abcd";
char s3[] = "abcde";
char s4[10] = "abcde";
printf("%d %d %d %d\n", sizeof(s1), sizeof(s2), sizeof(s3), sizeof(s4));
//char s5[5] = "abcde";
//printf("哈哈%c哈%c哈", s5[4], s5[5]);
int *p = NULL;
printf("%d\n", sizeof(p));
return 0;
}