编辑代码

class Main {
	public static void main(String[] args) {
          int side = divideToSquare(640, 400);
        System.out.println(side);
	}
     public static int divideToSquare(int length,int width){
        if(length<width||width<=0||length<=0){
            System.out.println("数据不正确");
            return -1;
        }
        while(length%width!=0){
            int temp=width;
            width=length%width;
            length=temp;
        }
        return width;
    }
}