Question

1!+2!+3!+4!+5!+6!+7!+8!+9!+10!在C语言编程软件VC++6.0中怎么编？

Answer 1

int a , sum;
for (int i=1 ; i<11; i++)
{for(int j=1; j<i; j++ )
a*= j;
sum +=a;
}

Answer 2

#include <stdio.h>
#define N 10 //默认求10项
void main ()
{
int i,t=1,sum=0;
for (i=1;i<=N;i++)
{
t*=i;//t=i!
sum+=t;
}
printf("sum=%d\n");
}