'commit'

C++专题课程/基础知识/高精度阶乘.cpp

@@ -0,0 +1,30 @@
+#include<bits/stdc++.h>
+using namespace std;
+int main() {
+	long i,j, n,len=0,p;
+	long a[10000]= {0};
+	a[0]=1;
+	scanf("%ld",&n);
+	//һ<><D2BB><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><C4B3><EFBFBD><EFBFBD><EFBFBD>
+	for(i=1; i<=n; i++) {
+		//ÿһλ<D2BB><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>i
+		for(j=0; j<=len; j++)
+			a[j]*=i;
+		p=0;
+		//<2F><><EFBFBD><EFBFBD>ÿһλ
+		while(p<=len) {
+			//ÿ<>ν<EFBFBD>һλ
+			if(a[len]>9) {
+				len++;
+			}
+			a[p+1]+=a[p]/10;//ȡ<><C8A1><EFBFBD><EFBFBD>λ
+			a[p]=a[p]%10; //ȡ<>ౣ<EFBFBD><E0B1A3>
+			p++;
+		}
+	}
+	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+	for(i=len; i>=0; i--)
+		printf("%ld",a[i]);
+	return 0;
+}
+