题解 | #统计字符#

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

int returnchar(char c){
    int number = (int)c;
    if(c==' ')return 1;
    else if(number>64&&number<=90)return 0;
    else if(number>96&&number<=122)return 0;
    else if(number>47&&number<=57)return 2;
    else return 3;
    return 9;
}
int main() {
    string a;
    getline(cin,a);
    vector<int>v;
    for(int i=0;i<a.size();i++){
        int num = returnchar(a[i]);
        v.push_back(num);
    }
    for(int i=0;i<4;i++){
        cout<<count(v.begin(),v.end(),i)<<endl;
    }
}
// 64 位输出请用 printf("%lld")