- Baseball Game题目链接682. Baseball Game题目分析给定一个字符串数组，每一个字符串有以下形式：数字。直接计算得分。+。代表本轮分数为上一轮和上上一轮分数之和。D。代表本轮分数为上一轮分数的两倍。C。代表上一轮分数无效。返回最终得分。思路这题没什么好说的了。用switch…case区分各种情况，进行相应处理即可。最终代码<?phpclass Solution { function calPoints($ops) { $points = []; foreach($ops as $op){ $max = count($points); switch($op){ case ‘+’: $p = 0; if(isset($points[$max-1])){ $p += $points[$max-1]; } if(isset($points[$max-2])){ $p += $points[$max-2]; } $points[] = $p; break; case ‘D’: $points[] = isset($points[$max-1])?$points[$max-1]*2:0; break; case ‘C’: array_pop($points); break; default: $points[] = (int)$op; break; } } return array_sum($points); }}若觉得本文章对你有用，欢迎用爱发电资助。