33582023-02-27 11:09:11CWMAutókódoláscpp17Compilation error
// 0227.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
using namespace std;
using ll = long long;
string ConvertToBits(ll a) {
	ll divisor = pow(2, 41);
	string s = "";
	for (size_t i = 0; i < 42; i++)
	{
		if (a - divisor >= 0) {
			s += '1';
			a -= divisor;
		}
		else s += '0';
		divisor/=2;
	}
	return s;
}
string FindNext(string cur) {
	int oc = 0;
	bool hadOne = false;
	for (int i = 41; i >= 0; i--)
	{
		if (cur[i] == '0' && hadOne) {
			cur[i] = '1';
			for (int j = i+1; j < 42; j++)
			{
				if (j > 42-oc) cur[j] = '1';
				else cur[j] = '0';
			}
			return cur;
		}
		else if (cur[i] == '1') {
			hadOne = true;
			oc++;
		}
	}
}
string FindPrevious(string cur) {
	for (int i = 41; i > 0; i--)
	{
		if (cur[i] == '0' && cur[i - 1] == '1') {
			cur[i] = '1';
			cur[i - 1] = '0';
			return cur;
		}
	}
	return "-1";
}
ll Reconvert(string cur) {
	if (cur == "-1") return -1;
	ll val = 0;
	ll addition = 1;
	for (int i = 41; i >= 0; i--)
	{
		if (cur[i] == '1') val += addition;
		addition *= 2;
	}
	return val;
}
int main()
{
	string c = ConvertToBits(4294967296);
	string n = FindNext(c);
	string p = FindPrevious(c);
	ll nI = Reconvert(n);
	ll pI = Reconvert(p);
	cout << pI << "\n" << nI;
}

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Compilation error
exit status 1
main.cpp: In function 'std::string ConvertToBits(ll)':
main.cpp:8:22: error: 'pow' was not declared in this scope
    8 |         ll divisor = pow(2, 41);
      |                      ^~~
main.cpp: In function 'std::string FindNext(std::string)':
main.cpp:40:1: warning: control reaches end of non-void function [-Wreturn-type]
   40 | }
      | ^
Exited with error status 1