以更简单的方式编写代码

时间:2016-10-11 13:28:17

标签: java magic-square

int[][] board = new int[i][i];
int row = 0;
int col = i / 2;
int num = 1;
while (num <= i * i) {
    board[row][col] = num;
    num++;
    int tCol = (col + 1) % i;
    int tRow = (row - 1) >= 0 ? row - 1 : i - 1;
    if (board[tRow][tCol] != 0) {
        row = (row + 1) % i;
    } else {
        row = tRow;
        col = tCol;
    }
}
System.out.println("Number of wins: " + ifCorrect);
M.Print(i, board);

上面的代码是创建魔方的代码。我如何以更简单的形式编写下面的代码,以便java中的初学者理解?

int tRow = (row - 1) >= 0 ? row - 1 : i - 1;

1 个答案:

答案 0 :(得分:1)

简化行(适合初学者程序员):

int tRow = (row - 1) >= 0 ? row - 1 : i - 1;

让我们扩展三元表达式,并将(row-1) >= 0简化为等效的row >= 1

int tRow;
if (row >= 1) {
    tRow = row-1;
} else {
    tRow = i - 1;
}