使用 Winsock2 缓冲区将 Char* 转换为 Int 的 C++ 错误

Question

I've been looking for hours trying to understand how I can convert

a ( char* to a int ) I'm getting at valread = socket( sock , buffer, 1024); at the end of try to read my buffer.

I kept looking for any way to convert it properly, but I could not. Thank you for your help, here is my code :)

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include<winsock2.h>
#include <Windows.h>
#include<WS2tcpip.h>
#include <string.h>
#define PORT 8080

int main(int argc, char const *argv[])
{
    struct sockaddr_in address;
    int sock = 0, valread;
    struct sockaddr_in serv_addr;



    char const *hello = "Hello from client";
    char buffer[1024] = {0};
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        printf("\n Socket creation error \n");
        return -1;
    }

    memset(&serv_addr, '0', sizeof(serv_addr));

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(PORT);

    // Convert IPv4 and IPv6 addresses from text to binary form
    if(inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr)<=0) 
    {
        printf("\nInvalid address/ Address not supported \n");
        return -1;
    }

    if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
    {
        printf("\nConnection Failed \n");
        return -1;
    }
    send(sock , hello , strlen(hello) , 0 );
    printf("Hello message sent\n");
    valread = socket( sock , buffer, 1024);
    printf("%s\n",buffer );
    return 0;
}

Answer 1

If i understand your question right, you want to convert a char* to an int?

To convert a char* to an int in c++ there are usually several ways, mostly depending on the c++ standard you can use. The following code snippet goes with the assumption, that your desired char* is named m_pChar

std::atoi (array to integer) from the header stdlib.h

int i;
i = std::atoi(m_pChar);