initgraph(&driver,&mode,"")；这行有错误

#include <graphics.h> //https://www.runoob.com/cprogramming/c-exercise-example56.html 
int main()
{
    int driver, mode, i;
    float j = 1, k = 1;
    driver = VGA;
    mode = VGAHI;
    initgraph(&driver, &mode, "");
    setbkcolor(YELLOW);
    for (i = 0; i <= 25; i++)
    {
        setcolor(8);
        circle(310, 250, k);
        k = k + j;
        j = j + 0.3;
    }
    return 0;
}
/*https://www.runoob.com/cprogramming/c-exercise-example56.html 
这里复制到代码，自学不知道怎么处理这个错误*/