Question

How to reverse the first N characters in the string with C++

Answer 1

#include <iostream>
#include <string>
#include <algorithm>

using std::cout;
using std::endl;

int main()
{
	std::string s = "abcdefg";
	int N = 5;

	std::reverse(s.begin(), s.begin() + N);
	
	cout << s << endl;

	return 0;
}

/*
run:

edcbafg

*/

 

Cleaner teeth, healthier you!
Get The Secret to a Bright and Healthy Smile