利用特征提取和分类的方法,假设输入值为{大,圆,光滑}为水果的三个特征值,来代表三种不同的水果,识别苹果\梨\香蕉\桔子\菠萝水果类别. -The use of feature extraction and classification methods, assuming that the import value was (large, round, smooth fruit) for the three characteristics of value, to represent three

作业题目是：将字符串"apple", "grape", "pear" 写入到磁盘文件f12-5.txt中，然后再从该文件中读出，显示到屏幕。-Job title is: the string " apple" , " grape" , " pear" is written to a disk file f12-5.txt in, and then read from the file is displayed to the screen.

将字符串 Apple 、 grade 、 pear 写入到磁盘文件f12-5.txt中， 然后再从该文件中读出，显示到屏幕-The string Apple , grade , pear is written to a disk file f12-5.txt in Then read the file to the screen

这是一个苹果梨分类问题，根据辨识的特点区分出苹果和梨-This is a classification problem apple pear, apple and pear distinguished according to the characteristics of identification