下列程序运行时的输出结果是___【8】___。#include＜iostream＞using namespace std;int Xfun(int*a, int n);int main()int b[6]={-2, 6, 8, -3, 5, 4);cout＜＜Xfun(b, 6)＜＜end1;return 0;}int Xfun(int*a, int n){int x=0;for(int*p=a; p＜a+n; p++)if(*p＞0)x+=*p;return X;}