string.cpp

#include <iostream>
#include <stdlib.h>

using namespace std;

int main() {
    int i, length;
    string s, r;

    cout << "string: ";
    cin >> s;

    r = "";

    length = s.length();
    for (i = 0; i < length; i++) {
        if (s[i] != '*') {
            r += s[i];
            r += s[i];
        }
    }

    cout << r << endl;
}