#include<iostream>
#include <string>
#include <cctype>
using namespace std;
int main()
{
    string line;
    cout<<"please enter a line"<<endl;
    getline(cin,line);
    string::size_type nLetter=0,nDigit=0,nOthers=0;
    for(auto c:line)
    {
        if(isalpha(c))
            ++nLetter;
        if(isdigit(c))
            ++nDigit;
        else
            ++nOthers;
    }
    cout<<"字母有"<<nLetter<<endl;
    cout<<"数字有"<<nDigit<<endl;
    cout<<"其他字符有"<<nOthers<<endl;
    return 0;
}

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