Laggy Output to Console - c++

Question

I have been trying to make asteroids in the console, I know that the console isn't an ideal way to do this, but I wanted to challenge myself.
The problem I am having is with printing to the screen. At first, my screen was flickering because I wasn't updating certain screen parts and instead redrawing every frame by appending the whole array to a string and outputting that string.
So I changed my code to do that, but my current problem now is that the fps of my game is really low because I can't batch call it to one cout function.
To print my code to the screen I have a 2d array of characters with width and height as its size. Then I copy the array, change the output, and compare it to the previous output to see if the pixel needs to be changed, then change it.
Here is my draw function
void draw() {
char prevOutput[ArrayBorder][ArrayBorder];
copyOutput(outputBuffer, prevOutput);
innitOutput();
plotPolygons();
for (int y = 0; y < GameBorder; y++) {
for (int x = 0; x < GameBorder; x++) {
if (outputBuffer[x][y] == prevOutput[x][y]) {continue;}
setCursorPosition(x, y);
cout << outputBuffer[x][y];
}
}
cout.flush();
}
Here is my previous draw function
void draw() {
innitOutput();
plotPolygons();
system("CLS");
string output = "";
for (int y = 0; y < GameBorder; y++) {
for (int x = 0; x < GameBorder; x++) {
output += outputBuffer[x][y];
}
output += "\n";
}
cout << output;
}