【2024CSP-J初赛】阅读程序（1）试题详解

阅读程序完成下面的题目：

#include <iostream>
using namespace std;bool isPrime(int n){if (n <= 1){return false;}for (int i = 2; i * i <= n; i++){if (n % i == 0){return false;}}return true;
}int countPrimes(int n){int count = 0;for (int i = 2; i <= n; i++){if (isPrime(i)){count++;}}return count;
}int sumPrimes(int n){int sum = 0;for (int i = 2; i <= n; i++){if (isPrime(i)){sum += i;}}return sum;
}int main()
{int x;cin >> x;cout << countPrime