C 一个非递减数组下标从0到n 元素的取值范围为从0到n的整数判断其中是否有重复元素

心已赠人 2022-04-22 09:32 173阅读 0赞

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#include <iostream>#define NULL 0using namespace std;int hasDup(int a[], int n){ for(int i = 0; i <= n; ++i) {  while(a[i] != i && a[i] != -1)  {   if(a[a[i]] == -1)   {    return 1;   }   a[i] = a[a[i]];   a[a[i]] = -1;  }  if(a[i] == i)  {   a[i] = -1;  } } return 0;}void main(){ int a[10] = {
        0, 2, 3, 3, 3, 5, 6, 7, 8, 9}; int result = hasDup(a, 9); if(result == 1) {  cout << "The array does HAVE the duplicated nodes." << endl; } else {  cout << "The array does NOT HAVE the duplicated nodes." << endl; }}// Output:/*The array does HAVE the duplicated nodes.*/

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