C++题解 | #字符串排序 10行代码#

#include <iostream>
using namespace std;
int main(){
    string str;
    char out[1000];
    int k = 0;
    getline(cin, str);
    for(int i = 0; i < 26; ++i)
        for(int j = 0; j < str.size(); ++j)
            if(str[j]-'a'==i || str[j]-'A'==i)
                out[k++] = str[j];
    k = 0;
    for(int i = 0; i < str.size(); ++i)
        if(isalpha(str[i]))
            str[i] = out[k++];
    cout << str;
}