将字符串转换为大小写 Turbo Prolog [英] Convert string to Upper and Lower case Turbo Prolog

问题描述

如何在 Turbo Prolog 中将字符串转换为大写和小写.

How do I convert a string to Upper and to Lower case in Turbo Prolog.

string_upper 和 string_lower 函数用于 SWI Prolog，

string_upper and string_lower function is for SWI Prolog,

我发现了类似的东西，

tolower([], []).
tolower([Upper|UpperTail], [Lower|LowerTail]) :-
char_type(Lower, to_lower(Upper)),
tolower(UpperTail, LowerTail).

但是没弄明白到底是什么.谁能帮我解决这个问题.

But didn't get what exactly it is. Can anyone help me solve this.

推荐答案

我是用 upper_lower() 做到的，

I did it using upper_lower(),

write("Enter string to convert\n"),
readln(Str1),


upper_lower(Str1,Low),
write("In lower case "),
write(Low),nl,
write("In Upper Case "),
upper_lower(Upp,Str1),
write(Upp). 

upper_lower 谓词:upper_lower 谓词可用于将大写字符转换为小写，或将小写字母转换为大写.谓词的一般形式是upper_lower(UpperCaseString,LowerCaseUpperCaseString)

The upper_lower Predicate: The upper_lower predicate can be used to convert uppercase characters to lowercase, or lowercase letters to uppercase. The general form of the predicate is upper_lower(UpperCaseString, LowerCaseUpperCaseString)

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