用c语言写出 一个进程循环收， 另一个进程循环发(发送端进程将ip 地址和端口号用参数传入) 发送端，键盘输入输入 接收端，打印对方的ip地址和内容

在C语言中编写这样的程序需要使用到`stdio.h`, `sys/socket.h`, `netinet/in.h`, 和 `arpa/inet.h` 等头文件，以及创建socket、绑定、监听、接收和发送数据的基本网络编程知识。这里提供一个简单的示例，分为发送端和接收端两个部分：

**发送端 (sender.c)**

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define PORT 9000
#define MAX_BUF 100

int main(int argc, char *argv[]) {
    if (argc != 3) {
        printf("Usage: %s <IP> <PORT>\n", argv[0]);
        return -1;
    }

    int sock = socket(AF_INET, SOCK_STREAM, 0);
    struct sockaddr_in server_addr;
    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(atoi(argv[2]));
    inet_aton(argv[1], &server_addr.sin_addr);

    if (connect(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("Connect failed");
        return -1;
    }

    while (1) {
        char input[MAX_BUF];
        printf("Enter data to send: ");
        fgets(input, MAX_BUF, stdin);
        input[strcspn(input, "\n")] = '\0'; // Remove newline character

        send(sock, input, strlen(input), 0);
        printf("Data sent: %s\n", input);
    }
    close(sock);
    return 0;
}

**接收端 (receiver.c)**

#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define PORT 9000
#define MAX_BUF 100

int main() {
    int sock = socket(AF_INET, SOCK_STREAM, 0);
    struct sockaddr_in server_addr;
    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    server_addr.sin_port = htons(PORT);

    if (bind(sock, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("Bind failed");
        return -1;
    }

    listen(sock, 5);  // Listening for incoming connections

    while (1) {
        struct sockaddr_in client_addr;
        socklen_t addr_len = sizeof(client_addr);
        int new_sock = accept(sock, (struct sockaddr *)&client_addr, &addr_len);

        char buffer[MAX_BUF];
        ssize_t bytes_received;
        do {
            bytes_received = recv(new_sock, buffer, MAX_BUF, 0);
            buffer[bytes_received] = '\0';
            printf("Received from %s:%d: %s\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port), buffer);
        } while (bytes_received > 0);

        close(new_sock);
    }
    close(sock);
    return 0;
}

要运行这个程序，先编译发送端（例如：`gcc sender.c -o sender`），然后提供IP地址和端口号作为命令行参数，如`./sender 127.0.0.1 9000`。然后启动接收端，它会监听并处理来自发送端的数据。