c功能包括：文件菜单中新建、打开、另存、保存、预览、打印、退出；编辑菜单中复制、剪切、粘贴、撤消、还原；字体、字号、字色的攺变；段落的左、中、右对齐、缩进等；查找和替换功能等。-Features include: file menu, new, open, save, save, preview, print, quit the Edit menu to copy, cut, paste, undo, restore font, size, character color Yi transi

小世界网络模拟，首先从n个顶点环形开始，每个顶点由无向边连接最近的k个顶点，疾病根据传染率r进行传播，并计算临界值rhalf-calculate of smallword networks