Min and Max While!+0 With Functions

#include<iostream>
using namespace std;

int n,nmax=-9999999, nmin=9999999;

void getMin(int n){
    if(n<nmin && n!=0){nmin=n;}
}

void getMax(int n){
    if(n>nmax && n!=0){nmax=n;}
}

void enterNum(){
    cin >> n;
    getMin(n);
    getMax(n);
    while(n!=0){
        enterNum();
    }
}

int main(){

enterNum();
cout << "Min: " << nmin << endl;
cout << "Max: " << nmax << endl;
}