But isn't snake[t] the t-th element in my vector which is a rectangle shape?

Also, after I added the braces around both t++ and the push back, the snake doesn't even show, I'm really confused.

I'm still very confused, what I'm trying to do is:

draw snake[0]

spawn fruit every 20 seconds (I know this is not how the real snake it, but whatever)

if the head of the snake(snake[0]) collides with the fruit, add 1 to t (which is first 0) and then add snake[t] to snake[0]

I also changed all the 0's in setFillColor,size,position to t's, but the problem still persists :/

But aren't the initial elements of the snake set in addsnake() ? Were should I set them? in main()?

I removed the setting of snake[t] from addsnake() and put them in main(), I also put the t increment in addsnake instead and made it return snake[t], the snake is now moving but intersecting with the fruit does nothing

I also tried changing snake.push_back(addsnake()) to snake[0].push_back(addsnake()), but it gives me an Error on push_back (class sf::RectangleShape has no member "push_back").

I understand what you mean, what I'm trying to do is make the next element of the existing vector appear after the first. I just want to increase the length of the snake upon colliding with the fruit, should I use something other than vectors better? Here is the updated code:-

#include <vector>
#include <limits>
#include <algorithm>




#include <SFML/Graphics.hpp>
#include <iostream>
int t = 0;
sf::RectangleShape addsnake();
sf::RectangleShape first;
sf::RectangleShape second;
sf::RectangleShape third;
sf::RectangleShape fourth;




std::vector<sf::RectangleShape>snake{first,second,third,fourth };




sf::RectangleShape addsnake(){


t++;




return snake[t];


}
bool intersects(const sf::RectangleShape & r1, const sf::RectangleShape & r2){
sf::FloatRect snake = r1.getGlobalBounds();
sf::FloatRect spawnedFruit = r2.getGlobalBounds();
return snake.intersects(spawnedFruit);


}


sf::RectangleShape generateFruit() {




sf::RectangleShape fruit;
fruit.setFillColor(sf::Color::Yellow);
int fruitx = rand() % 400;
int fruity = rand() % 400;
fruit.setPosition(fruitx, fruity);
fruit.setSize(sf::Vector2f(5, 5));


return fruit;




}
int main()
{
snake[t].setFillColor(sf::Color::Red);
snake[t].setPosition(100, 100);
snake[t].setSize(sf::Vector2f(20, 20));
srand(time(NULL));
int width = 400;
int height = 400;
sf::VideoMode videomode(width, height);
sf::RenderWindow window(videomode, "Snake");










sf::Clock clock;
sf::Time t1 = sf::seconds(20);
sf::RectangleShape spawnedFruit;
while (window.isOpen()) {
window.clear();
window.draw(snake[0]);






sf::Time elapsed1 = clock.getElapsedTime();
if (elapsed1 >= t1) {




spawnedFruit = generateFruit();


clock.restart();


}


window.draw(spawnedFruit);


window.display();
sf::Event event;
while (window.pollEvent(event))
{
if ((event.type == sf::Event::Closed) ||
((event.type == sf::Event::KeyPressed) && (event.key.code == sf::Keyboard::Escape)))
window.close();
}




if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up))


snake[0].move(0, -0.1);
else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
snake[0].move(0, 0.1);
else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
snake[0].move(-0.1, 0);
else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
snake[0].move(0.1, 0);


if (intersects(snake[0], spawnedFruit)){






snake.push_back(addsnake());
}


//tried snake[t]


















}


}

I'm sorry if I look like a complete retard right now, which I think is true.