4elist0404.cpp

《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。

// Listing 4.5 - demonstrates if statement
// used with relational operators
#include <iostream>
int main()
{
	using std::cout; 
	using std::cin;

	int MetsScore, YankeesScore;
	cout << "Enter the score for the Mets: ";
	cin >> MetsScore;

	cout << "\nEnter the score for the Yankees: ";
	cin >> YankeesScore;

	cout << "\n";

	if (MetsScore > YankeesScore)
		cout << "Let's Go Mets!\n";

	if (MetsScore < YankeesScore)
	{
		cout << "Go Yankees!\n";
	}

	if (MetsScore == YankeesScore)
	{
		cout << "A tie? Naah, can't be.\n";
		cout << "Give me the real score for the Yanks: ";
		cin >> YankeesScore;

		if (MetsScore > YankeesScore)
			cout << "Knew it! Let's Go Mets!";

		if (YankeesScore > MetsScore)
			cout << "Knew it! Go Yanks!";

		if (YankeesScore == MetsScore)
			cout << "Wow, it really was a tie!";
	}

	cout << "\nThanks for telling me.\n";
	return 0;
}