题解 | #使用字符函数统计字符串中各类型字符的个数#

#include <iostream>
#include <string>

using namespace std;
void strnum(string s,int &a,int &b,int &c,int &d)
{
    for(int i=0;s[i]!='\0';i++)
    {
        if(s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<='Z')
        c++;
        else if(s[i]>='0'&&s[i]<='9')
        b++;
        else if(s[i]==' ')
        a++;
        else
        d++;
    }
}
int main() {

    string str;
    getline(cin, str);

    int whitespace = 0;
    int digits = 0;
    int chars = 0;
    int others = 0;

    // write your code here......
    strnum(str,whitespace,digits,chars,others);

    cout << "chars : " << chars
        << " whitespace : " << whitespace
        << " digits : " << digits
        << " others : " << others << endl;

    return 0;
}