#include<iostream>
using?namespace?std;

void?main()
{
	char?s[100],?Letter;
	cout?<<?"輸入字符串：";
	cin?>>?s;

	int?count[26]?=?{?0?},?i,?s_i;?//?統(tǒng)計26個字母出現(xiàn)的次數(shù)

	int?n?=?strlen(s);???//計數(shù)器
	for?(i?=?0;?i<n;?i++)
	{
		s_i?=?s[i]?-?'a';
		count[s_i]++;?//?字符
	}
	
	for?(i?=?0;?i<26;?i++)
	{
		if?(count[i]?!=?0)?//?若該字母出現(xiàn)
		{
			Letter?=?'a'?+?i;
			cout?<<?Letter?<<?"?:?"?<<?count[i]?<<?endl;?//?輸出
		}
	}
}

#include<iostream>

#include<string>

using namespace std;

int main()

{

????cout << "請輸入字符串:" << endl;

????string s;

????getline(cin, s);

????int count = s.size();

????char letter[26] = { 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z' };

????for (int i = 0; i < 26; i++)

????{

????????????int num = 0;

????????????for (int j = 0; j < count; j++)

????????????{

????????????????????if (s[j] == letter[i])

????????????????????{

????????????????????????????????num++;

????????????????????}

????????????}

????????????if (num > 0)

????????????{

????????????????????cout << letter[i] << ":" << num << endl;

????????????}

????????????num = 0;

????????}

????????system("pause");

????????return 0;

}