输入两个整数m和n计算 m的阶乘一直加到n的阶乘 且m》n

#include
unsigned long int jiecheng(int k)//阶乘函数
{unsigned long int n=1;
while(k)
{n=n*k;
k=k-1;
}
return n;
}
unsigned long int qiuhe(int m,int n)//从m的阶乘加到n的阶乘函数
{unsigned long int he=0;
while(m