题解 | #去除字符串中重复的字符#

#include <iostream>
// write your code here......
#include <set>

using namespace std;

int main() {

    char str[100] = { 0 };
    cin.getline(str, sizeof(str));

    // write your code here......
    set<char> s;

    for (int i{0}; str[i] != '\0'; i++) {
        s.insert(str[i]);
    }

    for (auto& c: s) {
        cout << c;
    }

    return 0;
}