BOJ)10820 문자열 분석

https://www.acmicpc.net/problem/10820

#include <iostream>
#include <string>
#include <cstring>
using namespace std;
 
int main()
{
    string s;
    int arr[4];
    
    while (getline(cin,s)) {
        memset(arr, 0, sizeof(arr));
        for (int i = 0; i < s.size(); i++) {
            if (48 <= s[i] && s[i] <= 57) arr[2]++;
            else if (65 <= s[i] && s[i] <= 90) arr[1]++;
            else if (97 <= s[i] && s[i] <= 122) arr[0]++;
            else if (s[i] = ' ') arr[3]++;
        }
        for (int i = 0; i < 4; i++) cout << arr[i] << ' ';
        cout << "\n";
    }
 
    return 0;
}