Change font size in c++ [Windows]

#include <iostream>
#include <windows.h>

using namespace std;

int main()
{
    system("mode con:cols=80 lines=100");
    CONSOLE_FONT_INFOEX prompt;
    prompt.cbSize = sizeof(prompt);
    prompt.nFont = 0;
    prompt.dwFontSize.X = 0;                   // Width of each character in the font
    prompt.dwFontSize.Y = 15;                  // Height
    prompt.FontFamily = FF_DONTCARE;
    prompt.FontWeight = FW_NORMAL;
    std::wcscpy(prompt.FaceName, L"Consolas"); // Choose your font
    SetCurrentConsoleFontEx(GetStdHandle(STD_OUTPUT_HANDLE), FALSE, &prompt);

    cout<<"test";
}