4elist1302.cpp

来自「《21天学通C＋＋》附盘的原代码。书上的每个例子在这里都有相应的C语言程序。」· C++ 代码 · 共 51 行

//Listing 13.2
// Demonstrates what happens when you write past the end
// of an array

#include <iostream>
using namespace std;

int main()
{
	// sentinels
	long sentinelOne[3];
	long TargetArray[25]; // array to fill
	long sentinelTwo[3];
	int i;
	for (i=0; i<3; i++)
		sentinelOne[i] = sentinelTwo[i] = 0;

	for (i=0; i<25; i++)
		TargetArray[i] = 0;

	cout << "Test 1: \n";  // test current values (should be 0)
	cout << "TargetArray[0]: " << TargetArray[0] << "\n";
	cout << "TargetArray[24]: " << TargetArray[24] << "\n\n";

	for (i = 0; i<3; i++)
	{
		cout << "sentinelOne[" << i << "]: ";
		cout << sentinelOne[i] << "\n";
		cout << "sentinelTwo[" << i << "]: ";
		cout << sentinelTwo[i]<< "\n";
	}

	cout << "\nAssigning...";
	for (i = 0; i<=25; i++)
		TargetArray[i] = 20;

	cout << "\nTest 2: \n";
	cout << "TargetArray[0]: " << TargetArray[0] << "\n";
	cout << "TargetArray[24]: " << TargetArray[24] << "\n";
	cout << "TargetArray[25]: " << TargetArray[25] << "\n\n";
	for (i = 0; i<3; i++)
	{
		cout << "sentinelOne[" << i << "]: ";
		cout << sentinelOne[i]<< "\n";
		cout << "sentinelTwo[" << i << "]: ";
		cout << sentinelTwo[i]<< "\n";
	}

	return 0;
}