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程序如下：用于判断给定的终端 IP、子网掩码和目标 IP 是否在同一局域网内。请注意，这个程序假设 IP 地址是用整数表示的。

#include <iostream>
#include <sstream>
#include <vector>
#include <bitset>// Function to check if two IPs are in the same network
bool checkSameNetwork(std::string terminalIP, std::string subnetMask, std::string targetIP) {// Split the IP strings into octetsstd::istringstream terminalStream(terminalIP), subnetStream(subnetMask), targetStream(targetIP);std::vector<int> terminalOctets, subnetOctets, targetOctets;std::string octet;while (std::getline(terminalStream, octet, '.')) {terminalOctets.push_back(std::stoi(octet));}while (std::getline(subnetStream, octet, '.')) {subnetOctets.push_back(std::stoi(octet));}while (std::getline(targetStream, octet, '.')) {targetOctets.push_back(std::stoi(octet));}// Perform bitwise AND operation on corresponding octets of IP and subnet maskfor (size_t i = 0; i < 4; ++i) {if ((terminalOctets[i] & subnetOctets[i]) != (targetOctets[i] & subnetOctets[i])) {return false; // IPs are not in the same network}}return true; // IPs are in the same network
}int main() {std::string terminalIP, subnetMask, targetIP;// Input terminal IP, subnet mask, and target IPstd::cout << "Enter terminal IP: ";std::cin >> terminalIP;std::cout << "Enter subnet mask: ";std::cin >> subnetMask;std::cout << "Enter target IP: ";std::cin >> targetIP;// Check if terminal IP and target IP are in the same networkbool sameNetwork = checkSameNetwork(terminalIP, subnetMask, targetIP);// Output the resultif (sameNetwork) {std::cout << "true\n";} else {std::cout << "false\n";}return 0;
}

需要注意的是，此程序假定输入的 IP 地址是以点分十进制表示法给出的，并且子网掩码和 IP 地址都是有效的。此外，它假设 IPv4 地址，每个 IP 地址由四个十进制数构成。在实际生产环境中，还需要对输入进行更严格的验证和错误处理。