题解 | #去除字符串中重复的字符#

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

using namespace std;

int main() {

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

    // write your code here......
    set<char> st;
    char *p = str;
    while (*p != '\0')
    {
        st.insert(*p);
        ++p;
    }
    for (auto it = st.begin(); it != st.end(); ++it)
        cout << *it;

    return 0;
}

set的插入元素的考察。