int main()
{
//字元串一般是用數組存儲的
char arr1[] = "***"; //長度為4,
char arr2[] = { '*', '*', '*' }; //長度為3
int sz1 = sizeof(arr1) / sizeof(arr1[0]);
int sz2 = sizeof(arr2) / sizeof(arr2[0]);
printf("arr1的長度%d\n", sz1);
printf("arr2的長度%d\n", sz2);
return 0;
}