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843天前#include <iostream> |
#include <cstring> |
using namespace std; |
int main() |
{ |
int arr[10000] = {0}, a, brr[10000] = {0}; |
while(cin >> a) |
{ |
int count = 1, count1 = 1; ///count为阶乘数组位数，count1为结果数组位数; |
memset(arr, 0, sizeof(arr)); |
memset(brr, 0, sizeof(brr)); |
arr[0] = 1; |
for(int i = 1; i <= a; i++) |
{ |
///阶乘 |
for(int j = 0; j < count; j++) |
{ |
arr[j] *= i; |
} |
for(int j = 0; j < count; j++) |
{ |
if(arr[j] >= 10) |
{ |
arr[j + 1] += arr[j] / 10; |
arr[j] %= 10; |
} |
} |
while(arr[count]) |
{ |
arr[count + 1] += arr[count] / 10; |
arr[count] %= 10; |
count++; |
} |
|
|
///plus |
count1 = count; |
for(int i = 0; i < count; i++) |
{ |
brr[i] += arr[i]; |
if(brr[i] >= 10) |
{ |
brr[i + 1] += brr[i] / 10; |
brr[i] %= 10; |
} |
} |
while(brr[count1]) |
{ |
brr[count1 + 1] += brr[count1] / 10; |
brr[count1] %= 10; |
count1++; |
} |
} |
|
for(int i = count1 + 1; i >= 0; i--) ///输出 |
{ |
if(brr[i] != 0) |
{ |
for(int j = i; j >= 0; j--) |
cout << brr[j]; |
cout << endl; |
break; |
} |
} |
} |
return 0; |
} |
