如何更改我的代码，这样我就不必使用“break”？

Question

I'm completing an assignment give to me by my professor, and it states that I can't use break in my code, but without break the code doesn't stop when it needs to. I tried a couple of different options that I found on the internet, but nothing worked. This is my code:

while (x >= 0 && x <= 11 && y >= 0 || x >= 11 && x <= 22 && y >= -7) {
        x = v0 * t*Math.cos(Math.toRadians(a));
        y = v0 * t*Math.sin(Math.toRadians(a)) - g * (t*t) / 2;
        System.out.printf("%3.2f\t%7.3f\t%7.3f\n", t, x, y);
        if (x <= 20 && x >= 17 && y <= -2 && y >= -7) {
            hitTarget = true;
            break;
        }
    t += 0.05;
    }

Answer 1

Put !hitTarget in while . Since you're setting hitTarget = true when that condition gets satisfied, the loop will stop

while (!hitTarget && x >= 0 && x <= 11 && y >= 0 || x >= 11 && x <= 22 && y >= -7) {
    //..
}

Unary Operators

; Logical complement operator; inverts the value of a boolean