這段代碼里，main函數(shù)的n如果是負(fù)數(shù)還會(huì)輸出階乘等于零，要怎么優(yōu)化？
#include<stdio.h>
int?factorial(int?n)
{
????int?result;
????if(n<0)
????{
????????printf("輸出錯(cuò)誤！\n");
????????return?0;
????}
????else?if(n==0||n==1)
????{
????????result=1;
????}
????else
????{
????????result=factorial(n-1)*n;
????}
????return?result;
}
int?main()
{
????int?n=5;
????printf("%d的階乘=%d",n,factorial(n));
????return?0;
}
2021-11-02
加個(gè)判斷語(yǔ)句試試