做一個(gè)求階乘和的問(wèn)題，把int型換成long就會(huì)報(bào)錯(cuò)為什么
public class A1{
//求階乘的和
public static void main(String[] args){
System.out.println(h(30));
}
public static long h(int n){
long sum=0;int result=1;//改成long result=1;出錯(cuò)
for(int i=1;i<=n;i++){
result*=i;
sum+=result;
}
return sum;
}
}