AC代码1(函数判断)

#include <iostream>
using namespace std;
int prime(int n) //枚举法求n是否素数
{
	for (int i = 2; i <= n - 1; i++)
    {
		if (n % i == 0)
        {
            return 0; //不是素数返回0
        }
    }
	return 1; //是素数返回1
}
int main()
{
	int x;
	cin >> x;
	if (prime(x))
        cout << "T";
	else
        cout << "F";
	return 0;
}

AC代码2(布尔类型)

#include <iostream>
using namespace std;
int main()
{
    int n;
    bool prime = true;
    cin >> n;
    for(int i = 2; i <= n / 2; ++i)
    {
        if(n % i == 0)
        {
            prime = false;
            break;
        }
    }
    if (prime)
        cout << "T";
    else
        cout << "F";
    return 0;
}