// Assume C89.
#include <stdio.h>

char const *random = "Hello world!\n";
void const *hypothetical[] = {&random};

int main() {
    char *test;
    printf("Pointer to random: %p\n", random);
    printf("Pointer to hypothetical: %p\n", hypothetical);
    test = (char *) hypothetical;
    printf("Dereference from hypothetical: %p\n", *test); // Should equal random.
}

Pointer to random: 00408004
Pointer to hypothetical: 00408068
Dereference from hypothetical: 00000064

// Assume C89.
#include <stdio.h>

char const *random = "Hello world!\n";
void const **hypothetical[] = {&random};

int main() {
    char **test;
    printf("Pointer to random: %p\n", random);
    printf("Pointer to hypothetical: %p\n", hypothetical);
    test = (char **) hypothetical[0];
    printf("Dereference from random: %p\n", *test);
}

first = true
point = (mark)
while first:
    while true:
        while true:
            first = false
            trace point
print "end"

.watch-thread-link { 
    background-image: url('data:image/gif;base64,R0lGODlhEAAQAJEAAAAAAP9vb2yH5BAEAAAMALAAAAAAQABAAAAIvnI+pq+D9DBAUoFkPFnbs7lFZKIJOJJ3MyraoB14jFpOcVMpzrnF3OKlZYsMWowAAOw==') !important;
    opacity: 1 !important;
}

.watch-thread-link.watched { 
    background-image: url('https://static.4cdn.org/image/favicon-ws.ico') !important;
}

.watch-thread-link { 
    background-image url('dataimagegif;base64,<inserted actual base 64 value of the favicon uri seen below> ') !important;
    opacity 1 !important;
}
.watch-thread-link.watched { 
    background-image url('https://s.4cdn.org/image/favicon-ws.ico') !important;
}

.watch-thread-link {
background-image: url('data:image/x-icon;base64, <inserted base64 value of 4chan favicon uri>');
}

.watch-thread-link.watched {
background-image: url('data:image/x-icon;base64, <inserted base64 value of 4chan favicon uri>');
opacity: 1;
}

/((?!\/(hdg|dlg)\/).)*/i;op:only;boards:vg;

/(\/(hdg|dlg)\/).*/i

/^((?!(\/(hdg|dlg)\/)).)*$/i;type:subject;boards:vg;

/^(?!.*\/(hdg|dlg)\/).*/i

.watch-thread-link {
background-image: url('data:image/x-icon;base64, <inserted base64 value of 4chan favicon uri>');
}

.watch-thread-link.watched {
background-image: url('data:image/x-icon;base64, <inserted base64 value of 4chan favicon uri>');
opacity: 1 !important;
}

.watch-thread-link { 
    background-image url("https://s.4cdn.org/image/favicon-ws.ico") !important;
    opacity 1 !important;
}
.watch-thread-link.watched { 
    background-image url("https://s.4cdn.org/image/favicon-ws.ico") !important;
}

.watch-thread-link {
    background-image: url("https://s.4cdn.org/image/favicon-ws.ico") !important;
    opacity: 1 !important;

    /* background-position: 0px 2px; */
    vertical-align: middle;
}
.watch-thread-link.watched { 
    background-image: url("https://s.4cdn.org/image/favicon.ico") !important;
}

.watch-thread-link {
    background-image: url("https://s.4cdn.org/image/favicon-ws.ico") !important;
    opacity: 1 !important;

    /* background-position: 0px 2px; */
    vertical-align: middle;
}
.watch-thread-link.watched { 
    background-image: url("https://s.4cdn.org/image/favicon.ico") !important;
}

.watch-thread-link > .icon {
    display: none;
}

/* Hide the default SVG icon */
.watch-thread-link > .icon {
    display: none !important;
}

/* Update watch thread link to show 4chan favicon */
.watch-thread-link { 
    background-image: url("https://s.4cdn.org/image/favicon-ws.ico") !important;
    background-repeat: no-repeat !important;
    background-size: contain !important;
    width: 18px;
    height: 18px;
    display: inline-block; /* Ensures proper alignment */
    vertical-align: middle; /* Adjust alignment with adjacent elements */
    cursor: pointer;
    opacity: 1 !important;
}

/* Watched thread icon */
.watch-thread-link.watched { 
    background-image: url("https://s.4cdn.org/image/favicon-ws.ico") !important;
    background-repeat: no-repeat !important;
    background-size: contain !important;
}

/* Align the checkbox next to the watch-thread-link */
.op .postInfo > input[type="checkbox"] {
    vertical-align: middle; /* Aligns checkbox with the favicon */
    margin-left: 5px; 
}

/* Hide the default SVG icon */
.watch-thread-link > .icon {
    display: none !important;
}

/* Update watch thread link to show 4chan favicon */
.watch-thread-link { 
    background-image: url('https://s.4cdn.org/image/favicon.ico') !important;
    background-repeat: no-repeat !important;
    background-size: contain !important;
    width: 18px;
    height: 18px;
    display: inline-block; /* Ensures proper alignment */
    vertical-align: middle; /* Adjust alignment with adjacent elements */
    cursor: pointer;
    opacity: 1  !important;
}

/* Watched thread icon */
.watch-thread-link.watched { 
    background-image: url('https://s.4cdn.org/image/favicon-ws.ico') !important;
    background-repeat: no-repeat !important;
    background-size: contain !important;
    
}

/* Align the checkbox next to the watch-thread-link */
.op .postInfo > input[type="checkbox"] {
    vertical-align: middle; /* Aligns checkbox with the favicon */
    margin-left: 5px; /* Optional: Add space between checkbox and other elements */
}

/* Hide the default SVG icon */
.watch-thread-link > .icon {
    display: none !important;
}

/* Update watch thread link to show 4chan favicon */
.watch-thread-link { 
    background-image: url('https://s.4cdn.org/image/favicon.ico') !important;
    vertical-align: sub;
    background-repeat: no-repeat !important;

    opacity: 1  !important;
}

/* Watched thread icon */
.watch-thread-link.watched {
    background-image: url('https://s.4cdn.org/image/favicon-ws.ico') !important;
    filter: drop-shadow(0px 0px 4px rgb(100 100 255 / 0.75));
}

/* Align the checkbox next to the watch-thread-link */
.op .postInfo > input[type="checkbox"] {
    vertical-align: bottom; /* Aligns checkbox with the favicon */
}

/* Hide the default SVG icon */
.watch-thread-link > .icon {
    display: none !important;
}

/* Update watch thread link to show 4chan favicon */
.watch-thread-link { 
    background-image: url('https://s.4cdn.org/image/favicon.ico') !important;
    vertical-align: sub;
    background-repeat: no-repeat !important;

    opacity: 1  !important;
}

/* Watched thread icon */
.watch-thread-link.watched {
    background-image: url('https://s.4cdn.org/image/favicon-ws.ico') !important;
    filter: drop-shadow(0px 0px 4px rgb(100 100 255 / 0.75));
}

/* Align the checkbox next to the watch-thread-link */
.op .postInfo > input[type="checkbox"] {
    vertical-align: bottom; /* Aligns checkbox with the favicon */
}

using System;

class Program
{
    static void Main()
    {
        double num1;
        bool inputIsValid = false;

        while (!inputIsValid)
        {
            Console.WriteLine("Enter the first number:");
            string userInput = Console.ReadLine();

            if (string.IsNullOrWhiteSpace(userInput))
            {
                Console.WriteLine("Input can't be empty. Please enter a number.");
            }
            else if (double.TryParse(userInput, out num1))
            {
                inputIsValid = true; // Exit loop
                Console.WriteLine($"You entered a valid number: {num1}");
            }
            else
            {
                Console.WriteLine("Invalid input. Please enter a valid number.");
            }
        }
    }
}