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;
    int i = 0;
    for (int j = 0; str[j] != '\0'; j++) {
        if (st.find(str[j]) == st.end()) {
            st.insert(str[j]);
            str[i++] = str[j];
        }
    }
    str[i] = '\0';
    set<char>::iterator it;
    for (it = st.begin(); it != st.end(); it++) {
        printf("%c", *it);
    }
    printf("\n");
    return 0;
}