How to see output of C program in Linux or UNIX

/* Purpose: A simple program to get name and information about current kernel
 * using uname(2) on a Linux.
 * Author: Vivek Gite <https://www.cyberciti.biz>
 */
#include <sys/utsname.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/utsname.h>
 
int main(void){
	int i;
	struct utsname myname;
	i = uname(&myname); /* hold the structure */
	if ( i == 0 ){
		printf("Operating system name : %s\n",myname.sysname);
		printf("Node name : %s\n",myname.nodename);
		printf("Operating system release : %s\n",myname.release);
		printf("Operating system name : %s\n",myname.version);
		printf("Hardware identifier : %s\n",myname.machine);
	}
	else {
		 fprintf(stderr,"Oh no. uname(2) failed with %s\n", strerror(errno));
		 exit(1);
	}
	return 0;
}