我正在开发一种方法,随机将船只放置在 10x10 网格上,用于战舰。 它有时会起作用,但有时它会在没有放置船的情况下永远运行,即使它有一个可以清楚放置船只的地方。
我觉得它与随机数生成有关。
这是我的代码:
public void placeAllShips() {
int dir = 0;
int xCoord = 0;
int yCoord = 0;
boolean flag;
boolean overlap;
for (int i=0; i<5; i++) {
flag = true;
overlap = false;
while (flag) {
xCoord = (int)(Math.random()*(10)); //get a random x coordinate
yCoord = (int)(Math.random()*(10)); //get a random y coordinate
dir = (int)(Math.random()*(2)); //get a random direction, 0 = horizontal, 1 = vertical
if ((cellArr[xCoord][yCoord].hasShip()==false)&&(((dir==0)&&((xCoord+i)<=9))||((dir==1)&&((yCoord+i)<=9)))) {
for (int j=0; j<i+1; j++) {
if ((dir==0)&&(cellArr[xCoord+j][yCoord].hasShip())) {
overlap = true;
}
else if ((dir==1)&&(cellArr[xCoord][yCoord+j].hasShip())) {
overlap = true;
}
}
if (overlap==false) {
flag = false;
}
}
System.out.print("A");
}
System.out.println(xCoord+":"+yCoord+":"+dir);
for (int k=0; k<i+1; k++) {
if (dir==0) {
cellArr[xCoord+k][yCoord].setHasShip(true);
}
else {
cellArr[xCoord][yCoord+k].setHasShip(true);
}
}
}
}
答案 0 :(得分:3)
overlap
设置为false
。overlap
设置为true
。overlap
仍为true
。 Ergo,向下移动overlap = false;
一行。