请问这个C程序该怎么编，重谢

#include <iostream.h>
void main( )
{
int m,n,i,j;
int s1=1,s2=1;
cout<<"please enter m:";
cin>>m;
cout<<"please enter n:";
cin>>n;
for(i=1;i<=m;i++)
s1=s1*i;
for(j=1;j<=n;j++)
s2=s2*j;
cout<<"m!+n!="<<s1+s2<<endl;

}
这样就可以