面试题20：顺时针打印矩阵

剑指Offer面试题20：顺时针打印矩阵

题目描述：输入一个矩阵，按照从外向里以顺时针的顺序依次打印每一个数字。

function PrintMatrixClockwisely(numbers, columns, rows) {        if(numbers == null || columns <= 0 || rows <= 0) {            return false;        }        var start = 0;        while(columns > start*2 && rows > start*2) {            printMatrixInCircle(numbers, columns, rows, start);            start++;        }        function printMatrixInCircle(numbers, columns, rows, start) {            var endX = columns - 1 - start,            endY = rows - 1 - start;            //从左到右打印一行            for(var i = start; i <= endX; i++) {                console.log(numbers[start][i]);            }            //从上到下打印一列            if(start < endY) {                for(var i = start+1; i <= endY; i++) {                    console.log(numbers[i][endX]);                }            }            //从右到左打印一行            if(start < endX && start < endY) {                for(var i = endX-1; i >= start; i--) {                    console.log(numbers[endY][i]);                }            }            //从右下到上打印一列            if(start < endX && start < endY - 1) {                for(var i = endY-1; i >= start+1; i--) {                    console.log(numbers[i][start])                }            }        }    }