生成一段c++语言 可以设置windows系统ip地址，网关，DNS的代码

下面是一段 C 语言代码，可以用于设置 Windows 系统的 IP 地址、网关和 DNS：

#include <windows.h>
#include <iphlpapi.h>
#include <stdio.h>

int main() {
    DWORD dwRetVal = 0;

    // Create IP helper API structures
    ULONG ulOutBufLen = sizeof(IP_ADAPTER_INFO);
    PIP_ADAPTER_INFO pAdapterInfo = malloc(sizeof(IP_ADAPTER_INFO));
    if (pAdapterInfo == NULL) {
        printf("Error allocating memory needed to call GetAdaptersInfo\n");
        return 1;
    }

    // Call GetAdaptersInfo function to get adapter information
    if (GetAdaptersInfo(pAdapterInfo, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW) {
        // realloc buffer and call function again
        free(pAdapterInfo);
        pAdapterInfo = malloc(ulOutBufLen);
        if (pAdapterInfo == NULL) {
            printf("Error allocating memory needed to call GetAdaptersInfo\n");
            return 1;
        }
        dwRetVal = GetAdaptersInfo(pAdapterInfo, &ulOutBufLen);
    } else {
        dwRetVal = ERROR_SUCCESS;
    }
    if (dwRetVal != ERROR_SUCCESS) {
        printf("Error calling GetAdaptersInfo\n");
        return 1;
    }

    // Loop through the list of adapters and set the IP and DNS information
    PIP_ADAPTER_INFO pAdapter = pAdapterInfo;
    while (pAdapter != NULL) {
        // Set the IP address
        DWORD dwIPAddress = inet_addr("192.168.0.100");
        DWORD dwIPSubnetMask = inet_addr("255.255.255.0");
        DWORD dwIPGateway = inet_addr("192.168.0.1");
        DWORD dwIPDNS = inet_addr("8.8.8.8");
        dwRetVal = SetIpAddrTable((PMIB_IPADDRTABLE)&dwIPAddress, dwIPSubnetMask, dwIPGateway);
        if (dwRetVal != NO_ERROR) {
            printf("Error setting IP address: %d\n", dwRetVal);
            return 1;
        }

        // Set the DNS information
        PIP_ADDR_STRING pDNS = &pAdapter->DnsServerList;
        dwRetVal = DnsWriteResolverConfiguration(pAdapter->AdapterName, pDNS, NULL, 0, 0);
        if (dwRetVal != NO_ERROR) {
            printf("Error setting DNS information: %d\n", dwRetVal);
            return 1;
        }

        // Move to the next adapter in the list
        pAdapter = pAdapter->Next;
    }

    printf("IP address, gateway and DNS settings successfully updated\n");
    return 0;
}

这段代码使用了 Windows 的 IP helper API 来获取网络适配器信息，并设置了指定的 IP 地址、网关和 DNS 服务器。请注意，这段代码仅用于演示，实际上在修改系统网络配置时需要谨慎，以免导致网络故障。