c++代码不使用curl进行post提交

可以使用C++的网络编程库，如Socket或Boost.Asio来发送HTTP POST请求。以下是一个使用Socket的示例代码：

#include <iostream>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")

int main() {
    WSADATA wsaData;
    int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
    if (iResult != 0) {
        std::cerr << "WSAStartup failed: " << iResult << std::endl;
        return 1;
    }

    SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (s == INVALID_SOCKET) {
        std::cerr << "socket failed: " << WSAGetLastError() << std::endl;
        WSACleanup();
        return 1;
    }

    sockaddr_in serverAddr;
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    serverAddr.sin_port = htons(8080);

    iResult = connect(s, (SOCKADDR*)&serverAddr, sizeof(serverAddr));
    if (iResult == SOCKET_ERROR) {
        std::cerr << "connect failed: " << WSAGetLastError() << std::endl;
        closesocket(s);
        WSACleanup();
        return 1;
    }

    std::string postData = "param1=value1&param2=value2";
    std::string request = "POST /api HTTP/1.1\r\n"
        "Host: 127.0.0.1:8080\r\n"
        "Content-Type: application/x-www-form-urlencoded\r\n"
        "Content-Length: " + std::to_string(postData.length()) + "\r\n"
        "\r\n"
        + postData;

    iResult = send(s, request.c_str(), request.length(), 0);
    if (iResult == SOCKET_ERROR) {
        std::cerr << "send failed: " << WSAGetLastError() << std::endl;
        closesocket(s);
        WSACleanup();
        return 1;
    }

    char response[1024];
    iResult = recv(s, response, sizeof(response), 0);
    if (iResult > 0) {
        std::cout << "Response: " << std::string(response, iResult) << std::endl;
    }
    else if (iResult == 0) {
        std::cerr << "Connection closed" << std::endl;
    }
    else {
        std::cerr << "recv failed: " << WSAGetLastError() << std::endl;
    }

    closesocket(s);
    WSACleanup();

    return 0;
}

此代码使用Socket连接到本地主机的8080端口，发送一个带有两个参数的POST请求。您需要将127.0.0.1和8080替换为您实际要连接的主机和端口，以及postData中包含的实际数据。