#include<iostream>
#include<string>
using namespace std;
int main()
{char input_str[100];  //输入有空格的一行。cin默认以空格结束cin.getline(input_str, 100);int num_num = 0;int num_letter = 0;int num_space = 0;int num_other = 0;int len = strlen(input_str);cout << "len:" << len<<endl;for (int i = 0; i<len; i++) {if (input_str[i] >= '0' && input_str[i] <= '9')num_num++;else if ((input_str[i] >= 'A' && input_str[i] <= 'Z') || input_str[i] >= 'a' && input_str[i] <= 'z')num_letter++;else if (input_str[i] == ' ')num_space++;elsenum_other++;}cout << "letter:" << num_letter << endl;cout << "number:" << num_num << endl;cout << "space:" << num_space << endl;cout << "other character:" << num_other << endl;return 0;
}