how to determine subnet mask

Description A subnet mask is a basis for determining whether the IP addresses of any two computers belong to the same subnet.The subnet mask is the same as the IP address structure, which is a 32-bit binary number, where the network number section is all "1" and the host number is all "0". Use the

Title DescriptionA subnet mask is a basis for determining whether the IP addresses of any two computers belong to the same subnet.The subnet mask is the same as the IP address structure, which is a 32-bit binary number, where the network number section is all "1" and the host number is all "0". Use the

: Determine whether the IP addresses of any two computers belong to the same subnet * Source: Huawei Machine Test exercises---- -------------------------------------*/#include #include "OJ.h"#include #include using namespace STD;/* Function: Determine the IP address of the two computers is the same subnet. Prototype: i

IP address A, b IP (a) 188.188.0.111 10111100.10111100.00000000.01101111 IP (b) 188.188.5.222　10111100.10111100.00000101.11011110 Mask 255.255.254.0 11111111.11111111.11111110.00000000255.255.254.0 is a subnet mask made up of 23 1, simply speaking, as long as the IP address from the left to the right of the first 23 bits 1 location and the same number of IPs belo

#include #include #include #include int if_a_string_is_a_valid_ipv4_address (const char *STR){struct IN_ADDR addr;int ret;volatile int local_errno;errno = 0;ret = Inet_pton (af_inet, str, ADDR);Local_errno = errno;if (Ret > 0);else if (Ret printf ("Eafnosupport:%s\n", Strerror (Local_errno));Elseprintf ("\"%s\ "is not a valid IPV4 address\n", str);return ret;}BOOL Issubnetmask_and_is_ipv4_address (const char *ip_address, char *subnet){if (if_a_string_