vc++相关调用函数问题

vc++函数及其应用的相关问题…调试运行与输出结果…相关代码…

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第一题:

  #include<iostream>
using namespace std;
void reserve(int *a,int l, int r);
int main()
{
    int n;
    cin >> n;
    int *a = new int[n];
    for (int i = 0; i < n; i++)
        cin >> a[i];
    reserve(a,0,0);
    reserve(a,1, n - 1);
    reserve(a,0, n - 1);
    for (int i = 0; i < n; i++)
        cout << a[i]<<" ";
    getchar();
    getchar();
    return 0;

}
void reserve(int *a,int l, int r)
{
    while (l < r)
    {
        int temp = a[l];
        a[l] = a[r];
        a[r] = temp;
        l++;
        r--;
    }
}
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