itsa基 15 文字及字母出現次數

#include<iostream>
#include<string>
using namespace std;

int main()
{
string str;
int count = 1;
int arr[26] = {0};
int arr1[26] = {0};
getline(cin, str);
for (int i = 0; i < str.length(); i++)
{
if (str[i] >= 'A' && str[i] <= 'Z')
arr[str[i] - 'A']++;
else if (str[i] >= 'a' && str[i] <= 'z')
arr1[str[i] - 'a']++;
if (str[i] == ' ')
count++;
}
cout << count << endl;
for (int j = 0; j < 26; j++)
{
if (arr[j] != 0)
cout << (char)('A' + j) << " : " << arr[j] << endl;
else if (arr1[j] != 0)
cout << (char)('a' + j) << " : " << arr1[j] << endl;
}
return 0;
}