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Task/String-case/XPL0/string-case.xpl0

@@ -0,0 +1,18 @@
+string 0;                       \use zero-terminated string convention
+include c:\cxpl\stdlib;         \ToUpper, ToLower, and 'code' declarations
+
+proc StrToUpper(S);             \Convert string to uppercase characters
+char S;
+while S(0) do [S(0):= ToUpper(S(0));  S:=S+1];
+
+proc StrToLower(S);             \Convert string to lowercase characters
+char S;
+while S(0) do [S(0):= ToLower(S(0));  S:=S+1];
+
+char Str;
+[Str:= "alphaBETA";
+StrToUpper(Str);
+Text(0, Str);  CrLf(0);
+StrToLower(Str);
+Text(0, Str);  CrLf(0);
+]