Simple Hello Server/Client program

Server-Client Program/Client/Client.cpp

@@ -0,0 +1,52 @@
+//Client side program in C/C++
+
+#include <stdint.h>
+#include <netinet/ip.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <errno.h>
+#include <arpa/inet.h>
+
+
+using namespace std;
+static void msg( const char* msg){
+    fprintf(stderr, "%s\n", msg);
+}
+
+static void die(const char* msg){
+    int err = errno;
+    fprintf(stderr, "[%d] %s\n", err,msg);
+    abort();
+}
+
+int main(){
+
+    int fd = socket(AF_INET, SOCK_STREAM, 0);
+    if( fd < 0 ){
+        die("socket()");
+    }
+
+    struct sockaddr_in addr = {};
+    addr.sin_family = AF_INET;
+    addr.sin_port = ntohs(1234);
+    addr.sin_addr.s_addr = ntohl(INADDR_LOOPBACK);// 127.0.0.1
+    int rv = connect(fd, (const struct sockaddr*)&addr, sizeof(addr));
+    if( rv ){
+        die("connect");
+    }
+
+    char msg[] = "hello";
+    write(fd, msg, strlen(msg));
+
+    char rbuf[64] = {};
+    ssize_t n = read(fd, rbuf , sizeof(rbuf) - 1);
+    if( n < 0 ){
+        die("read");
+    }
+    printf("server says: %s\n", rbuf);
+    close(fd);
+    return 0;
+}