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目前面临的问题? 示例: 简单输入不是全括号中缀形式: 319*((5.5+12.9)-(4.5/3.0)) 示例输出:( 319 * ( ( 5.5 + 12.9 ) - ( 4.5 / 3.0 ) ) )
将结果解析为表达式树并使用您选择的树遍历将树返回。