<p>以下程序的输出是24，请将程序补充完整。<img src="https://learnfile.20230611.cn/learnAppQuestion/3a/05/3a0573f04d8dcb283f7e707fccadece8.png" style="width: 100%;height: auto;"><br><img src="https://learnfile.20230611.cn/learnAppQuestion/42/16/4216efb4dab2cc930057a2f9f