Visual C++ 2008入门经典 第四章数组 字符串(练习题)

   //练习题一:

    /*int arraySize = 5; //数组的长度

	double* values = new double[arraySize]; //初始化一个values的指针，成员为五个

	double* temp = 0; //定义一个零时指针

	double inputValue = 0.0;

	int index = 0;

	for(;;)

	{

	    cout<<"请输入数值(按0退出):";

		cin>>inputValue;

		if(inputValue == 0.0){

		    break;

		}

		values[index] = inputValue;

		index++;

		if(index == arraySize)

		{

		    arraySize += 5;

			temp = new double[arraySize];

			for(int i=0; i<index; i++){

			    temp[i] = values[i];

			}

			delete[] values;

			values = temp;

			temp = 0;

		}

	}

	cout<<"index:"<<index<<endl;

	for(int i=0; i < index; i++)

	{

		cout<<i<<":"<<values[i]<<" ";

		inputValue += values[i];

		if(i % 5 == 0){

		   cout<<endl;

		}

	}

	cout<<"输入的总数为:"<<inputValue<<endl;*/





    //第二题

    /*int arraySize = 5; //数组的长度

	double* values = new double[arraySize]; //初始化一个values的指针，成员为五个

	double* temp = 0; //定义一个零时指针

	double inputValue = 0.0;

	int index = 0;

	for(;;)

	{

	    cout<<"请输入数值(按0退出):";

		cin>>inputValue;

		if(inputValue == 0.0){

		    break;

		}

		*(values+index) = inputValue;

		//values[index] = inputValue;

		index++;

		if(index == arraySize)

		{

		    arraySize += 5;

			temp = new double[arraySize];

			for(int i=0; i<index; i++){

			    //temp[i] = values[i];

				*(temp+i) = *(values+i);

			}

			delete[] values;

			values = temp;

			temp = 0;

		}

	}

	cout<<"index:"<<index<<endl;

	for(int i=0; i < index; i++)

	{

		cout<<i<<":"<<*(values+i)<<" ";

		inputValue += *(values+i);

		if((i+1) % 5 == 0){

		   cout<<endl;

		}

	}

	cout<<"输入的总数为:"<<inputValue<<endl;*/





    //第三题

    /*char ch[] = "Doctor Livingstone, I presume?";

	cout<<"ch:"<<ch<<endl;

	for(int i=0; i<strlen(ch); i++)

	{

		if(ch[i] >='a' && ch[i] <='z'){

		    ch[i] -= 32;

		}

	}

	cout<<"ch:"<<ch<<endl;*/



 

    //第四题

    /*Random^ gandomAr = gcnew Random;

	array<int>^ values = gcnew array<int>(gandomAr->Next(10,20));



	for(int i=0; i<values.Length; i++)

	{

	     values[i] = gandomAr->Next(100,1000);

	}



	for(int j=0; j<values.Length; j++)

	{

		Console::WriteLine("{0}",values[j]);

	}

	//声明一下bool型的数组

	array<bool>^ used = gcnew array<bool>(values->Length);

	Array::Clear(used, 0, values->Length); //将所有数组进行赋值操作，为false



	int minimum = Int32::MaxValue; //设置为最大可能值电流最小, 这句真还不错，Int32::MaxValue值吗?

	Console::WriteLine("Int32::MaxValue:{0}",Int32::MaxValue); //2147483647

	int minIndex = 0;



	for(int count = 0; count<values->Length; count++)

	{

		for(int i=0; i<values->Length; i++)

		{

			//首先条件是值并没有输出过的情况下

			//这是一个整的循环，是为了找出最小的值来

			if(!used[i] && minimum > values[i]) //看看这个mininum值到底是多少

			{

			     minimum = values[i];

				 minIndex = i;

				 //break; //刚才这里写了break所以不行的

			}

		}

		used[minIndex] = true;

		Console::Write("{0,10}", minimum);

		if((count+1) % 5 == 0){

		   Console::WriteLine();

		}

		minimum = Int32::MaxValue;

	}*/





    //第五题

    /*Random^ randomObj = gcnew Random;

	int value = randomObj->Next(100000,Int32::MaxValue-10000);

	Console::WriteLine("This is Values {0}",value);

	array<String^>^ digitWord ={L" Zero", L" one", L" two", L" three", L" four", L" five", L" six", L" seven", L" eight", L" nine"};

	//Console::WriteLine();

	String^ inWords = L"";

	while(value > 0)

	{

	    inWords = digitWord[value % 10] + inWords;

		value = value / 10;

	}

	Console::WriteLine("this is value:{0}", inWords);*/





    //第六题

    array<String^>^ values = {

               L"\"Madam I'm Adam.\"",

			   L"\"Don't cry for me, Marge and Tina.\"",

			   L"\"Lid off a daffodil.\"",

			   L"\"Red lost soldier.\"",

			   L"\"Cigar? Toss it in a can. It is so tragic.\""};

	/*for(int i=0; i<values->Length; i++)

	{

		Console::WriteLine(values[i]);

	}*/

	

	String^ letters;

	bool isPalindrome;

	for each(String^ phrase in values)

	{

	     letters = L"";

		 //提取字符的小字

		 for each(wchar_t ch in phrase)

		 {

			 if(Char::IsLetter(ch)){ //判断是否为什么东东

			     letters += Char::ToLower(ch); //然后变成小写，保存到letters

			 }

		 }

		 isPalindrome = true;

		 //分两半来循环

		 for(int i=0; i<letters->Length/2; i++)

		 {

			 //取得当前i, 在取得与i对应的后半段值

			 if(letters[i] != letters[letters->Length - i - 1])

			 {

			     isPalindrome = false;

				 break; //为什么要停止，这个得把一半对比完才行呢

				 //还是说只对比一个值吗？

				 //这里只对比一次两个值就成了

			 }

		 }

		 Console::WriteLine(L"\"" + phrase + L"\""

			  + (isPalindrome ? " is " : " is not")+L" a palindrome.");

	}