Programming_Course/Chapter 2/2-8.cpp

#include<iostream>

int main()
{
	std::cout << "输入要计算的区间范围:";
	float a, b, c;
	c = 1;
	std::cin >> a >> b;
	for (float i = a; i < b; i++) {
		c = i * c;
	}
	std::cout << c;
}