不知哪位大神能解釋一下這個代碼？還是新手，請幫幫忙！
#include<stdio.h>
int?factorial(int?n)
{
????int?result;
????if(n<0)
????{
????????printf("輸出錯誤！\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;
}
2021-03-11
假設(shè)n=5
factorial(5)=factorial(4)*5=factorial(3)*4*5=factorial(2)*3*4*5=factorial(1)*2*3*4*5
又因?yàn)閒actorial(1)=1
所以 factorial(5)=1*2*3*4*5