strlen 与 sizeof 区别

int main(int argc,char *argv[])

{

char buf[1000];

buf[0] = '0';

printf("%d\n",strlen(buf));

printf("%d\n",sizeof(buf));

buf[0] = '1';

buf[1] = '2';

printf("%d\n",strlen(buf));

buf[2] = '\0';

printf("%d\n",sizeof(buf));

printf("%d\n",strlen(buf));

}

linux@ubuntu:~/3.10/tcp/tem$ ./test

7

1000

7

1000

2