print all substrings in c++
#include <iostream>
#include <string>
using namespace std;
void printSubstrings(string str) {
int n = str.length();
for (int len = 1; len <= n; len++) {
for (int i = 0; i <= n - len; i++) {
int j = i + len - 1;
for (int k = i; k <= j; k++) {
cout << str[k];
}
cout << endl;
}
}
}
int main() {
string s = "hello";
printSubstrings(s);
return 0;
}