client_inet1.c

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


/* MAIN */

int main() {

    /* VARS */
    int sock_fd;
    struct sockaddr_in socket_address;
    char buffer[256];

    /* BODY */

    sock_fd = socket(AF_INET, SOCK_STREAM, 0);

    if(sock_fd == -1){

        perror("Errore sys call socket()");
        exit(EXIT_FAILURE);

    }

    socket_address.sin_family = AF_INET;
    socket_address.sin_port = htons(2020);
    socket_address.sin_addr.s_addr = inet_addr("79.52.89.92");

    if(connect(sock_fd, (struct sockaddr*)&socket_address, sizeof(socket_address)) == -1){

        perror("Errore sys call connect()");
        exit(EXIT_FAILURE);

    }

    while(1){

        bzero(buffer, strlen(buffer));
        printf("\nInserisci un numero intero di cui vuoi il quadrato > ");
        fgets(buffer, 255, stdin);

        write(sock_fd, buffer, strlen(buffer));

        if(strncmp(buffer, "end", 3) == 0) break;

        read(sock_fd, buffer, 256);

        printf("%s", buffer);

    }

    close(sock_fd);

}