/*统计除了>之外的行里面CHED四个字母总数*/

 #include<fstream>

 #include<iostream>

 #include<cstring>

 using namespace std;

 class FindLetter

 {

     private:

         ifstream m_r;

         ofstream m_w;

         string m_falphabet,m_temp;

         char m_jump;//要跳跃的字符

         unsigned int *m_number,m_length;//计数 和 文件中的一行的个数

     public:

         FindLetter(const char * falphabet,char jump)

         //参数意思为：第一个参数,要找的字符串；第二个参数，在此行的第一个字符是jump不读取。

         {

             m_jump=jump;

             m_falphabet=falphabet;

             m_number=new unsigned int [m_falphabet.length()];

             memset(m_number,,sizeof(int)*m_falphabet.length());

         }

         ~FindLetter()

         {

             delete []m_number;

             m_r.close();

             m_w.close();

         }

         void setFindLetter(const char *falphabet,const char jump)//与构造函数相同

         {

             //写完后，请尝试this指针 调用构造函数

                 m_jump=jump;

                 m_falphabet=falphabet;

                 m_number=new unsigned int[m_falphabet.length()];

                 memset(m_number,,sizeof(int)*m_falphabet.length());

         }

         void countAlphabet(const char * filename);

         bool wTxt(const char * filename);

 };

 void FindLetter::countAlphabet(const char * filename)

 {

     m_r.open(filename);

     while(getline(m_r,m_temp))

         {

             m_length=m_temp.length();//文本文件中的一行字符的长度。

                 while(--m_length!=-&&m_temp[]!=m_jump)

                 {

                     int temp=m_falphabet.length();

                     //判断是否为要找的字符

                     while(--temp!=-)//从n-0数

                         if(m_falphabet[temp]==m_temp[m_length])

                         {

                             ++m_number[temp];

                         }

                 }

         }

     for(int i=m_falphabet.length()-;i>=;--i)

         cout<<m_falphabet[i]<<" : "<<m_number[i]<<endl;

 }

 bool FindLetter::wTxt(const char * filename)

 {

     m_w.open(filename);

     for(int i=m_falphabet.length()-;i>=;--i)

         m_w<<m_falphabet[i]<<" : "<<m_number[i]<<endl;

 }