正解： 此题非常简单 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > 需使用哈希表完成 > > > （不用也行） ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 思路 使用一个char类型的数组[1]和一个int类型的数组并对其进行初始化后，对char类型的数组进行输入，并获取其对应的字符长度，再使用哈希表[2]的思想，对其进行映射的操作[3],最后再对其输出[4]。 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 1. char s1[101]; ↩︎ 2. 看简介 ↩︎ 3. for(int i=0;i<n;i++){ char temp = s1[i]; arr[int(temp)]++; } ↩︎ 4. for(int i=0;i<127;i++){ if(arr[i] == 0){ continue; }else{ cout<<char(i)<<":"<<arr[i]<<endl; } } ↩︎

#include <iostream> #include <string> using namespace std; int main() { string a; cin >> a; int b[26] = {0}; for (char c : a) { b[c - 'a']; } for (int i = 0; i < 26; i) { if (b[i] > 0) { cout << char('a' + i) << ":" << b[i] << endl; } } }

#include<bits/stdc++.h> using namespace std; char s[100086]; int a[26]; int main() { cin>>s; int n = strlen(s); for(int j=0;j<n;j++){ for(int i=0;i<26;i++)if(s[j]==char('a'+i))a[i]; } for(int i=0;i<26;i)if(a[i]!=0)cout<<char('a'+i)<<':'<<a[i]<<endl; return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ char a='a'; int sum=0; char s[105]; cin>>s; int len=strlen(s); for(int i=1;i<=26;i++){ sum=0; for(int j=0;j<len;j++){ if(s[j]==a){ sum++; } } if(sum!=0){ cout<<a<<":"<<sum<<endl; } a++; } return 0; }

from collections import defaultdict count_dict=defaultdict(int) s=input().strip() for char in s: count_dict[char]+=1 for char in sorted(count_dict): if count_dict[char]>0: print(f"{char}:{count_dict[char]}")