题解 | #统计字符串中各类型字符的个数#

/*
判断字母isalpha
判断数字isdigit
判断空格isspace
String字符串读取：
getline(cin, inputLine);
Char buf[]字符数组：
cin.getline(sentence, SIZE);

*/
#include <iostream>
#include <cstring>
#include <cctype>
using namespace std;

int main() {

    int letter = 0;
    int digit = 0;
    int space = 0;
    int other = 0;
    
    char buf[1024] = {0};
    cin.getline(buf, sizeof(buf));
    string buf1(buf);
    for(int i = 0;i < buf1.size(); i++ ){
        if(isalpha(buf1[i])){
            letter++;
        }
        else if(isdigit(buf1[i])){
            digit++;
        }
        else if(isspace(buf1[i])){
            space++;
        }
        else{
            other++;
        }
    }
    // write your code here......
    

    cout << "letter:" << letter << " digit:" << digit << " space:" << space << " other:" << other << endl;

    return 0;
}