如何创建并打开文件myfile6.txt，将一周各天的英文名字（7个字符串）写进去，然后读出来写入文件myfile7.txt，以字符串的方式进行读\写。为何创建不了文件myfile6.txt和myfile7.txt？ 程序如下： #include <stdio.h> #include <stdlib.h> char s[7][10]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"}; void main() { char a[200]; int i; ...