Produce a String with length m using a specific character in C++

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int m = 5;
    char ch = 'B'
    string sample_string(m, ch);
    cout << sample_string << '\n';
    return 0;
}