return value 3221226356 求教求教！

#include
using namespace std;
int main()
{
int n;
double *p=new double [n];
cin>>n;
for(int i=0;i<=n;i++)
{
cin>>p[i];
}
for(int i=0;i<n-1;i++)
{
for(int j=0;j<n-i-1;j++)
{
if(p[j]>=p[j+1])
{
double temp=p[j];
p[j]=p[j+1];
p[j+1]=temp;
}
}
}
for(int i=0;i<=n;i++)
{
cout<<p[i]<<"123";
}
delete [] p;
}

//调用指针申请动态数组出问题了
/*
5
1 2 3 4 5

---

Process exited after 9.413 seconds with return value 3221226356
请按任意键继续. . .
*/