修改程序清单7.7中的3个数组处理函数,使之使用两个指针参数来表示区间.

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#include <iostream>const int Max = 5;double *fill_array(double *ar , double *limit);void show_array(const double *ar , double *n);void revalue(double r , double *ar , double *n);int main(){        using namespace std;        double properties[Max];        double *size = fill_array(properties , properties + Max);        show_array(properties , size);        cout << "Enter revaluation factor: ";        double factor;        cin >> factor;        revalue(factor , properties , size);        show_array(properties , size);        cout << "Done.\n";        return 0;}double *fill_array(double *ar , double *limit){        using namespace std;        double temp;        int i = 0;        double *p;        for(p = ar ; p < limit ; p++ , i++)        {                cout << "Enter value#" << (i + 1) << ": ";                cin >> temp;                if(!cin)                {                        cin.clear();                        while(cin.get() != '\n')                                continue;                        cout << "Bad input ; input process terminated.\n";                        break;                }                else if(temp < 0)                        break;                *p = temp;        }        return p;}void show_array(const double *ar , double *n){        using namespace std;        int i = 0;        for(const double *p = ar ; p < n ; p++ , i++)        {                cout << "Property #" << (i + 1) << ": $";                cout << *p << endl;        }}void revalue(double r , double *ar ,double *n){        for(double *p = ar ; p < n ; p++)        *p *= r;}

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