I think my code is right ,but the result is Compilation error.who can tell me the reason.
#include<iostream>
using namespace std;

int sum,average,min;

void fun(int *num,int i,int n,int current){
    if(i<n){
        fun(num,i+1,n,current);
        current+=num[i];
        int temp=sum-2*current;
        temp=(temp>0?temp:-1*temp);
        if(temp<min) min=temp;
        if(current<average)
            fun(num,i+1,n,current);
    }
}

void mySort(int *num,int n){
    for(int i=1;i<n;i++){
        int j=i-1,
            temp=num[i];
        while(j>=0&&num[j]>num[i]){
            num[j+1]=num[j];
            j--;
        }
        num[j+1]=temp;
    }
}

int main(){
    sum=0;
    int num[20];
    int n;
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>num[i];
        sum+=num[i];
    }
    average=sum/2;
    min=sum;
    mySort(num,n);
    int current=0;
    fun(num,0,n,current);
    cout<<min<<endl;
    return 0;
}