#include<iostream>
using namespace std;
int main()
{
int fac(int);
int sum = 0 ;
int a;
int b;
int c;
cout<<"输入abc的值";
cin>>a>>b>>c;
sum += fac(a) + fac(b) + fac(c);
cout<<"和为:"<<sum<<endl;
return 0;
}
int fac(int n){
int f =1;
for(int i=1;i<=n;i++){
f= f*i;
}
return f;
}
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