qfedu-basic-level/day8/homework/h9.cpp

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// 输入一个整数 n然后输入 n 个整数,输出其中所有素数的个数。
#include <iostream>
using namespace std;
bool isPrime(int num)
{
if (num <= 1) // 1 不是质数
return false;
int i = 2;
while (i * i <= num)
{
if (num % i == 0)
return false;
else
i++;
}
return true;
}
int main()
{
int n;
int *nums = new int[n];
int i = 0;
int cnt = 0; // 计数器
cout << "请输入整数 n: ";
cin >> n;
cout << "请输入" << n << "个整数: ";
while (i < n)
{
cin >> nums[i];
i++;
}
while (--n >= 0)
{
if (isPrime(nums[n]) == true)
cnt++;
else
continue;
}
cout << "输入的整数中所有素数的个数为: " << cnt << endl;
return 0;
}