【C++ Primer Plus习题】7.7

问题:

解答:

#include <iostream>
using namespace std;

#define SIZE 10

double* fill_array(double* begin, double* end)
{
	for (begin; begin < end; begin++)
	{
		cout << "请输入值:";
		cin >> *begin;
		if (cin.fail())
		{
			cout << "非法数字,结束输入!" << endl;
			break;
		}
	}
	return begin;
}

void show_array(double* arr, double* end)
{
	double* n = arr;
	cout << "数组信息为:";
	for (n; n < end; n++)
	{
		cout << *n << "  ";
	}
	cout << endl;
}

void revalue(double r, double* arr, double* end)
{
	double* n = arr;
	for (n; n < end; n++)
	{
		(*n) *= r;
	}
}

int main()
{
	double array[SIZE];
	double* begin = &array[0];
	double* end = &array[SIZE];

	double *index=fill_array(begin, end);
	show_array(array, index);
	revalue(2, array, index);
	show_array(array, index);

	return 0;
}

运行结果:

考查点:

• 数组和指针

2024年8月30日21:16:55