小编Amo*_*del的帖子

在C++中,为了处理错误的输入(比如当程序要求输入一个整数但你输入一个字符时)它应该能够做某事然后循环重复输入.

当需要整数时输入字符时,我的循环无限迭代,反之亦然:

#include<iostream>

int main()
{
    while (cout << "Enter a number" && !(cin >> num)) 
    {
        cin.sync(); 
        cin.clear();
        cout << "Invalid input; please re-enter.\n";
    }
}

我应该怎么做才能让程序再次提示输入新内容？

我为下面给出了二进制堆的程序 -

       #include<iostream>
     using namespace std;
        /**
         * Construct the binary heap.
         * capacity is the capacity of the binary heap.
         */

class BinaryHeap
        {

           private:
            int   currentSize;  // Number of elements in heap
            int array[];        // The heap array

            void buildHeap( );
            void percolateDown( int hole );
           public:
            bool isEmpty( ) const;
            bool isFull( ) const;
            int findmini( ) const;

            void insert( int x );
            void deleteMin( );
            void deleteMin( int minItem );
            void makeEmpty( );



       public :
       BinaryHeap( …