1 创建L4 1项目 2 给定一个存放了三段文章的字符串数组 点击 “文件显示”按钮 将第一段文章内容显示在文本框中 再次点击“文件显示”按钮 将第二段文章显示在文本框中 以此类推 filestr[0] "Singles Day in China is the celebration or mourning of being unattached Started by students in Nanjing in the mid 1990s the date was selected in observation of its four solitary digits