char a = in.next().charAt(0);//输入字符 int b = count(s,a);//调用函数 System.out.print(b); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 4.9 /* 从字符串的最右边开始遍历字符串,一次输出即可 */ import java.u...
下面是示例代码: publicclassCountExample{publicstaticvoidmain(String[]args){Stringstr="Hello, world!";charc='o';intcount=countOccurrences(str,c);System.out.println("The count of '"+c+"' in '"+str+"' is: "+count);}publicstaticintcountOccurrences(Stringstr,charc){char[]charArray=str.to...
CharCount packagedemo_map;importjava.util.*;importjava.util.Map.Entry;publicclassCharcount {publicstaticvoidmain(String[] args) { System.out.println("please code"); Scanner sc=newScanner(System.in); String str=sc.next(); findChar(str); }publicstaticvoidfindChar(String str){char[] arr=str...
首先是basecount 类,用于计数单词;这里有charcount(字符计数)、wordcount(单词计数)、linecount(行计数)、print(输入到指定文件夹)三个主要函数。 处理同目录下的文件extendedFun类;包括主要的统计代码行、注释行函数,停用计数函数两个主要函数。main函数整个程序流程的管控,调用解析参数函、计数类来统计内容、最后打印...
Added in 1.5. Java documentation forjava.lang.Character.charCount(int). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. ...
fnunique_letter_string(s:&str)->i32{// key : 某一种字符// value : 出现这种字符依次的位置letmutindies:HashMap<char,Vec<i32>>=HashMap::new();for(i, c)in s.chars().enumerate(){ indies.entry(c).or_insert_with(Vec::new).push(i asi32);}letmutres=;for(_, arr)in indies.it...
name char(1), age char(2)); Query OK, 0 rows affected (0.03 sec) mysql> insert into yyhTablevalues -> ('a', '14'),('a', '15'), ('a', '15'), -> ('b', NULL), ('b', '16'), -> ('c', '17'), -> ('d', null), ->('e', ''); Query OK, 8 rows ...
mysql>create tablecounttest(namechar(1),agechar(2));QueryOK,0rowsaffected(0.03sec)mysql>insert into counttest values->('a','14'),('a','15'),('a','15'),->('b',NULL),('b','16'),->('c','17'),->('d',null),->('e','');QueryOK,8rowsaffected(0.01sec)Records:8Dupli...
基础语法 PL/SQL 的程序结构 declare...光标数的限制 默认情况下,oracle 数据库只允许打开300个光标 show parameter cursor –查看光标数 alter system set open_cursors=’400...IS SELECT 语句; 实例 --查询某个部门中员工的姓名 set serveroutput on declare --定义嗲参数的光标 cursor ca(d char) is ...
let mut indies: HashMap<char, Vec<i32>> = HashMap::new(); for (i, c) in s.chars().enumerate() { indies.entry(c).or_insert_with(Vec::new).push(i as i32); } let mut res = 0; for (_, arr) in indies.iter() {