题解

#include <bits/stdc++.h>
using namespace std;
int main()
{
	string a;
	int num = 0, sum = 0, other = 0;
	getline(cin, a);
	for (int i = 0; i < a.length(); i++)
	{
		if (a[i] == '?')
		{
			break;
		}
		else if ((a[i] >= 'a' && a[i] <= 'z') || (a[i] >= 'A' && a[i] <= 'Z'))
		{
			sum++;
		}
		else if (a[i] >= '0' && a[i] <= '9')
		{
			num++;
		}
		else
		{
			other++;
		}
	}
	cout << "Letters=" << sum << endl;
	cout << "Digits=" << num << endl;
	cout << "Others=" << other << endl;
	return 0;
}