dic=dict() d={} s=set() s='helloworld' (1)d=dict() for x in s: if x not in d.keys(): d[x]=1 else: d[x]=d[x]+1 print(d) (2)d2=dict() for x in s: d2[x]=d2.get(x,0)+1 print(d2) (3)d3=dict() for x in s: d3[x]=s.count(x) print(d3) 上面一共给出了三种方法,均是以字典的形式输出,但
package 字母频率统计; import java.io.*; public class Inputfile { public static void main(String args[]) { try { char shu[] = new char[1000]; char zimu[] = new char[52]; int j=0; int count[]=new int[52]; String pathname="D:\\a.txt"; File filename=new F
题目描述: Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. This is case sensitive, for example "Aa" is not considered a palindrome here. Note:Assume the