1．现在输入n个数字，以逗号，分开；然后可选择升或者降序排序；按提交键就在另一页面显示按什么排序，结果为，提供reset
import java.util.*;
public class bycomma{
public static String[] splitStringByComma(String source){
   if(source==null||source.trim().equals(""))
    return null;
   StringTokenizer commaToker = new StringTokenizer(source,",");
   String[] result = new String[commaToker.countTokens()];
   int i=0;
   while(commaToker.hasMoreTokens()){
    result[i] = commaToker.nextToken();
    i++;
   }
   return result;
}
public static void main(String args[]){
String[] s = splitStringByComma("5,8,7,4,3,9,1");
int[] ii = new int[s.length];
for(int I = 0;i<s.length;i++){
ii[i] =Integer.parseInt(s[i]);
}
    Arrays.sort(ii);
    //asc
    for(int i=0;i<s.length;i++){
    System.out.println(ii[i]);
    }
    //desc
    for(int i=(s.length-1);i>=0;i--){
    System.out.println(ii[i]);
    }
}
}
2．金额转换，阿拉伯数字的金额转换成中国传统的形式如：（￥1011）－>（一千零一拾一元整）输出。
Package test.format;
import java.text.NumberFormat;
import java.util.HashMap;
public class SimpleMoneyFormat {
  public static final String EMPTY = "";
  public static final String ZERO = "零";
  public static final String ONE = "壹";
  public static final String TWO = "贰";
  public static final String THREE = "叁";
  public static final String FOUR = "肆";
  public static final String FIVE = "伍";
  public static final String SIX = "陆";
  public static final String SEVEN = "柒";
  public static final String EIGHT = "捌";
  public static final String NINE = "玖";
  public static final String TEN = "拾";
  public static final String HUNDRED = "佰";
  public static final String THOUSAND = "仟";
  public static final String TEN_THOUSAND = "万";
  public static final String HUNDRED_MILLION = "亿";
  public static final String YUAN = "元";
  public static final String JIAO = "角";
  public static final String FEN = "分";
  public static final String DOT = ".";

  private static SimpleMoneyFormat formatter = null;
  private HashMap chineseNumberMap = new HashMap();
  private HashMap chineseMoneyPattern = new HashMap();
  private NumberFormat numberFormat = NumberFormat.getInstance();

  private SimpleMoneyFormat() {
    numberFormat.setMaximumFractionDigits(4);
    numberFormat.setMinimumFractionDigits(2);
    numberFormat.setGroupingUsed(false);

    chineseNumberMap.put("0", ZERO);
    chineseNumberMap.put("1", ONE);
    chineseNumberMap.put("2", TWO);
    chineseNumberMap.put("3", THREE);
    chineseNumberMap.put("4", FOUR);
    chineseNumberMap.put("5", FIVE);
    chineseNumberMap.put("6", SIX);
    chineseNumberMap.put("7", SEVEN);
    chineseNumberMap.put("8", EIGHT);
    chineseNumberMap.put("9", NINE);
    chineseNumberMap.put(DOT, DOT);

    chineseMoneyPattern.put("1", TEN);
    chineseMoneyPattern.put("2", HUNDRED);
    chineseMoneyPattern.put("3", THOUSAND);
    chineseMoneyPattern.put("4", TEN_THOUSAND);
    chineseMoneyPattern.put("5", TEN);
    chineseMoneyPattern.put("6", HUNDRED);
    chineseMoneyPattern.put("7", THOUSAND);
    chineseMoneyPattern.put("8", HUNDRED_MILLION);
  }

  public static SimpleMoneyFormat getInstance() {
    if (formatter == null)
      formatter = new SimpleMoneyFormat();
    return formatter;
  }

  public String format(String moneyStr) {
    checkPrecision(moneyStr);
    String result;
    result = convertToChineseNumber(moneyStr);
    result = addUnitsToChineseMoneyString(result);
    return result;
  }

  public String format(double moneyDouble) {
    return format(numberFormat.format(moneyDouble));
  }

  public String format(int moneyInt) {
    return format(numberFormat.format(moneyInt));
  }

  public String format(long moneyLong) {
    return format(numberFormat.format(moneyLong));
  }

  public String format(Number moneyNum) {
    return format(numberFormat.format(moneyNum));
  }

  private String convertToChineseNumber(String moneyStr) {
    String result;
    StringBuffer cMoneyStringBuffer = new StringBuffer();
    for (int I = 0; I < moneyStr.length(); i++) {
      cMoneyStringBuffer.append(chineseNumberMap.get(moneyStr.substring(I, I + 1)));
    }
    //拾佰仟万亿等都是汉字里面才有的单位，加上它们
    int indexOfDot = cMoneyStringBuffer.indexOf(DOT);
    int moneyPatternCursor = 1;
    for (int I = indexOfDot - 1; I > 0; i--) {
      cMoneyStringBuffer.insert(I, chineseMoneyPattern.get(EMPTY + moneyPatternCursor));
      moneyPatternCursor = moneyPatternCursor == 8 ? 1 : moneyPatternCursor + 1;
    }

    String fractionPart = cMoneyStringBuffer.substring(cMoneyStringBuffer.indexOf("."));
    cMoneyStringBuffer.delete(cMoneyStringBuffer.indexOf("."), cMoneyStringBuffer.length());
    while (cMoneyStringBuffer.indexOf("零拾") != -1) {
      cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零拾"), cMoneyStringBuffer.indexOf("零拾") + 2, ZERO);
    }
    while (cMoneyStringBuffer.indexOf("零佰") != -1) {
      cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零佰"), cMoneyStringBuffer.indexOf("零佰") + 2, ZERO);
    }
    while (cMoneyStringBuffer.indexOf("零仟") != -1) {
      cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零仟"), cMoneyStringBuffer.indexOf("零仟") + 2, ZERO);
    }
    while (cMoneyStringBuffer.indexOf("零万") != -1) {
      cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零万"), cMoneyStringBuffer.indexOf("零万") + 2, TEN_THOUSAND);
    }
    while (cMoneyStringBuffer.indexOf("零亿") != -1) {
      cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零亿"), cMoneyStringBuffer.indexOf("零亿") + 2, HUNDRED_MILLION);
    }
    while (cMoneyStringBuffer.indexOf("零零") != -1) {
      cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零零"), cMoneyStringBuffer.indexOf("零零") + 2, ZERO);
    }
    if (cMoneyStringBuffer.lastIndexOf(ZERO) == cMoneyStringBuffer.length() - 1)
      cMoneyStringBuffer.delete(cMoneyStringBuffer.length() - 1, cMoneyStringBuffer.length());
    cMoneyStringBuffer.append(fractionPart);

    result = cMoneyStringBuffer.toString();
    return result;
  }


  private String addUnitsToChineseMoneyString(String moneyStr) {
    String result;
    StringBuffer cMoneyStringBuffer = new StringBuffer(moneyStr);
    int indexOfDot = cMoneyStringBuffer.indexOf(DOT);
    cMoneyStringBuffer.replace(indexOfDot, indexOfDot + 1, YUAN);


1. 以下三条输出语句分别输出什么？[C易]
char str1[]       = "abc";
char str2[]       = "abc";
const char str3[] = "abc";
const char str4[] = "abc";
const char* str5  = "abc";
const char* str6  = "abc";
cout << boolalpha << ( str1==str2 ) << endl; // 输出什么？
Cout << boolalpha << ( str3==str4 ) << endl; // 输出什么？
Cout << boolalpha << ( str5==str6 ) << endl; // 输出什么？

13. 非C++内建型别 A 和 B，在哪几种情况下B能隐式转化为A？[C++中等]
答：
a. class B : public A { ……} // B公有继承自A，可以是间接继承的
b. class B { operator A( ); } // B实现了隐式转化为A的转化
c. class A { A( const B& ); } // A实现了non-explicit的参数为B（可以有其他带默认值的参数）构造函数
d. A& operator= ( const A& ); // 赋值操作，虽不是正宗的隐式类型转换，但也可以勉强算一个

12. 以下代码中的两个sizeof用法有问题吗？[C易]
void UpperCase( char str[] ) // 将 str 中的小写字母转换成大写字母
{
    for( size_t i=0; i<sizeof(str)/sizeof(str[0]); ++I )
        if( 'a'<=str[i] && str[i]<='z' )
            str[i] -= ('a'-'A' );
}
char str[] = "aBcDe";
cout << "str字符长度为: " << sizeof(str)/sizeof(str[0]) << endl;
UpperCase( str );
cout << str << endl;

7. 以下代码有什么问题？[C难]
void char2Hex( char c ) // 将字符以16进制表示
{
    char ch = c/0x10 + '0'; if( ch > '9' ) ch += ('A'-'9'-1);
    char cl = c%0x10 + '0'; if( cl > '9' ) cl += ('A'-'9'-1);
    cout << ch << cl << ' ';
}
char str[] = "I love 中国";
for( size_t i=0; i<strlen(str); ++I )
    char2Hex( str[i] );
cout << endl;

4. 以下代码有什么问题？[C++易]
struct Test
{
    Test( int ) {}
    Test() {}
    void fun() {}
};
void main( void )
{
    Test a(1);
    a.fun();
    Test b();
    b.fun();
}

5. 以下代码有什么问题？[C++易]
cout << (true?1:"1") << endl;

8. 以下代码能够编译通过吗，为什么？[C++易]
unsigned int const size1 = 2;
char str1[ size1 ];
unsigned int temp = 0;
cin >> temp;
unsigned int const size2 = temp;
char str2[ size2 ];

9. 以下代码中的输出语句输出0吗，为什么？[C++易]
struct CLS
{
    int m_i;
    CLS( int I ) : m_i(i) {}
    CLS()
    {
        CLS(0);
    }
};
CLS obj;
cout << obj.m_i << endl;

10. C++中的空类，默认产生哪些类成员函数？[C++易]
答：
class Empty
{
public:
    Empty();                          // 缺省构造函数
    Empty( const Empty& );            // 拷贝构造函数
    ~Empty();                         // 析构函数
    Empty& operator=( const Empty& ); // 赋值运算符
    Empty* operator&();               // 取址运算符
    const Empty* operator&() const;   // 取址运算符 const
};

3. 以下两条输出语句分别输出什么？[C++难]
float a = 1.0f;
cout << (int)a << endl;
cout << (int&)a << endl;
cout << boolalpha << ( (int)a == (int&)a ) << endl; // 输出什么？
Float b = 0.0f;
cout << (int)b << endl;
cout << (int&)b << endl;
cout << boolalpha << ( (int)b == (int&)b ) << endl; // 输出什么？

2. 以下反向遍历array数组的方法有什么错误？[STL易]
vector array;
array.push_back( 1 );
array.push_back( 2 );
array.push_back( 3 );
for( vector::size_type i=array.size()-1; i>=0; --I ) // 反向遍历array数组
{
    cout << array[i] << endl;
}
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6. 以下代码有什么问题？[STL易]
typedef vector IntArray;
IntArray array;
array.push_back( 1 );
array.push_back( 2 );
array.push_back( 2 );
array.push_back( 3 );
// 删除array数组中所有的2
for( IntArray::iterator itor=array.begin(); itor!=array.end(); ++itor )
{
    if( 2 == *itor ) array.erase( itor );
}

11. 写一个函数，完成内存之间的拷贝。[考虑问题是否全面]
答：
void* mymemcpy( void *dest, const void *src, size_t count )
{
    char* pdest = static_cast<char*>( dest );
    const char* psrc = static_cast<const char*>( src );
    if( pdest>psrc && pdest<psrc+cout ) 能考虑到这种情况就行了
    {
        for( size_t i=count-1; i!=-1; --I )
                pdest[i] = psrc[i];
    }
    else
    {
        for( size_t i=0; i<count; ++I )
            pdest[i] = psrc[i];
    }
    return dest;
}
int main( void )
{
    char str[] = "0123456789";
    mymemcpy( str+1, str+0, 9 );
    cout << str << endl;

    system( "Pause" );
    return 0;
}