[C + +] Fundamentals point: namespace

Show The code:

#include <iostream>using namespace std;namespace counternamespace {int Upperbound;int lowerbound;class Counter { C0/>int count;public:counter (int n) {    if (n <= upperbound) {        count = n;    } else {        count = Upperbound;
   }}void Reset (int n) {    if (n < upperbound) {        count = n;    }} int run () {    if (Count > Lowerbound) {        return count--;    } else {        return lowerbound;}}    ;} int main () {counternamespace::upperbound = 100; Counternamespace::lowerbound = 0; Counternamespace::counter Obj1 (ten); int I;do {    i = Obj1.run ();    cout << i << ",";} while (i > Counternamespace::lowerbound); cout << Endl;return 0;}

[C + +] Basics point: namespace