c - IPv4 地址的 inet_aton 规范化

Question

inet_aton 难道不应该规范化互联网地址的点版本吗？为什么我得到以下示例的不同输出值？

int main(){
    char USER_IP[16] = "192.168.002.025";
    char USER_IP2[16] = "192.168.2.25";
    struct sockaddr_in addr;
    struct sockaddr_in addr2;

    inet_aton(USER_IP2, &addr.sin_addr);
    inet_aton(USER_IP, &addr2.sin_addr);

    printf("addr.sin_addr:%lu\n", addr.sin_addr);
    printf("addr2.sin_addr:%lu\n", addr2.sin_addr);


    return 0;
}

---

输出:

addr.sin_addr:419604672
addr2.sin_addr:352495808

Answer 1

来自 documentation

components of the dotted address can be specified in decimal, octal (with a leading 0), or >hexadecimal, with a leading 0X)

这意味着

char USER_IP[16] = "192.168.002.025";

表示 192 168 2(25 八进制 == 21)和

char USER_IP2[16] = "192.168.2.25";

表示 192 168 2 25