example1-4.cpp

来自「关于书籍《Borland c++Builder工程实践》的源代码」· C++ 代码 · 共 20 行

#include <iostream.h>
long int function1(int n);
void main()
{
int n;
cout<<"please enter a integer n=:";
cin>>n;
long m=function1(n);
cout<<"The  result of n! is :"<<m<<endl;
}
long int function1(int n)
{
long int x;
if(n==0)
x=1;
else 
x=n*function1(n-1);
return x;
}