问题:

解答:

#include <iostream>
using namespace std;

long double probability(double num1, double num2, double picks)
{
	long double result = 1.0;
	for (int i = num1;picks>0; i--,picks--)
	{
		result = result * (picks / i);
	}
	result *= 1 / num2;
	return result;
}

int main()
{
	int num1 = 0;
	int num2 = 0;
	int count;
	cout << "请输入普通号码域:";
	cin >> num1;
	cout << "请输入特殊号码域:";
	cin >> num2;
	cout << "请输入普通号码中奖的号数:";
	cin >> count;
	cout << "中头奖的概率为:" << probability(num1, num2, count)<<endl;

	return 0;
}

运行结果:

考查点:

• 函数
• 排列组合

2024年8月30日20:11:46