大数阶乘C/C++程序

 1 #include<iostream>
 2 using namespace std;
 3 int main(){
 4     int i,j,n,temp,d=0,carry;
 5     int a[3000];
 6     a[0]=1;
 7     cin>>n;
 8     for (i=2;i<=n;i++){
 9         for(j=0,carry=0;j<=d;j++){
10             temp=a[j]*i+carry;
11             a[j]=temp%10;
12             carry=temp/10;
13         }
14         while(carry){
15             d++;
16             a[d]=carry%10;
17             carry=carry/10;
18         }
19     }
20     cout<<n<<"!=";
21     for(j=d;j>=0;j--)
22         cout<<a[j];
23     cout<<endl;
24     return 0;
25 }