用C++的FOR语句写一个求阶乘的程序

#include <iostream.h>

int main( void )
{
int n,sum;
sum = 1;
cout<<"求多少的阶乘:";
cin>>n;
for( int i = 1; i <= n; i++ )
{
sum = sum * i;
cout<<sum<<endl;
}
return 0;
}

#include <iostream> using namespace std; int main() { int n,result; while(cin >>n) { result=1; if(n==-1) break; if(n==0) { cout<<1<<endl; continue; } while(n>=1) { result=result*n; n--; } cout<<result<<endl; } return 0; }

//输入-1结束