client.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

#define PORT 8080
#define BUFFER_SIZE 1024

int main() {
    int sockfd;
    struct sockaddr_in server_addr;
    char buffer[BUFFER_SIZE];

    // Create socket
    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        perror("Socket failed");
        exit(EXIT_FAILURE);
    }

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

    // Convert IP address from text to binary form
    if (inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) <= 0) {
        perror("Invalid address");
        exit(EXIT_FAILURE);
    }

    // Connect to the server
    if (connect(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("Connection failed");
        exit(EXIT_FAILURE);
    }

    printf("Connected to the server\n");

    // Communication loop
    while (1) {
        printf("Enter message to send to server: ");
        fgets(buffer, sizeof(buffer), stdin);
        
        // Send message to server
        send(sockfd, buffer, strlen(buffer), 0);

        // Receive server response
        memset(buffer, 0, sizeof(buffer));
        int n = recv(sockfd, buffer, sizeof(buffer), 0);
        if (n <= 0) {
            printf("Server disconnected or error occurred\n");
            break;
        }
        printf("Server: %s\n", buffer);
    }

    // Close the socket
    close(sockfd);
    return 0;
}