2985 - 【函数】阶乘和

no input needed

40284840

Solution C

#include<stdio.h>
int main()
{
 int s;
 s=fac(5)+fac(7)+fac(9)+fac(11);	
 printf("%d",s);
	
	return 0;
}

int fac(int a)
{   int i,s=1;
	for(i=2;i<=a;i++)
	s=s*i;
	
return s;	
}

Solution C++

	#include<iostream>
	using namespace std;
	int js(int);
	int main()
	{
		int sum=0;
		for (int i=5; i<12; i=i+2) sum+=js(i);
		cout<<sum<<endl;
		return 0;
	}
	int js(int n)
	{
		int s=1;
		for (int i=1; i<=n; i=i+1)
		s*=i;
		return s;
	}