1 /*统计除了>之外的行里面CHED四个字母总数*/ 2 #include<fstream> 3 #include<iostream> 4 #include<cstring> 5 using namespace std; 6 7 class FindLetter 8 { 9 private: 10 ifstream m_r; 11 ofstream m_w; 12 string m_falphabet,m_temp; 13 char m_jump;//要跳跃的字符 14 unsigned int *m_number,m_length;//计数 和 文件中的一行的个数 15 public: 16 FindLetter(const char * falphabet,char jump) 17 //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。 18 { 19 m_jump=jump; 20 m_falphabet=falphabet; 21 m_number=new unsigned int [m_falphabet.length()]; 22 memset(m_number,0,sizeof(int)*m_falphabet.length()); 23 24 25 } 26 ~FindLetter() 27 { 28 delete []m_number; 29 m_r.close(); 30 m_w.close(); 31 } 32 void setFindLetter(const char *falphabet,const char jump)//与构造函数相同 33 { 34 //写完后，请尝试this指针 调用构造函数 35 m_jump=jump; 36 m_falphabet=falphabet; 37 m_number=new unsigned int[m_falphabet.length()]; 38 memset(m_number,0,sizeof(int)*m_falphabet.length()); 39 40 } 41 void countAlphabet(const char * filename); 42 bool wTxt(const char * filename); 43 }; 44 void FindLetter::countAlphabet(const char * filename) 45 { 46 m_r.open(filename); 47 while(getline(m_r,m_temp)) 48 { 49 m_length=m_temp.length();//文本文件中的一行字符的长度。 50 51 while(--m_length!=-1&&m_temp[0]!=m_jump) 52 { 53 int temp=m_falphabet.length(); 54 //判断是否为要找的字符 55 while(--temp!=-1)//从n-0数 56 if(m_falphabet[temp]==m_temp[m_length]) 57 { 58 ++m_number[temp]; 59 60 } 61 } 62 63 } 64 for(int i=m_falphabet.length()-1;i>=0;--i) 65 cout<<m_falphabet[i]<<" : "<<m_number[i]<<endl; 66 } 67 bool FindLetter::wTxt(const char * filename) 68 { 69 m_w.open(filename); 70 71 for(int i=m_falphabet.length()-1;i>=0;--i) 72 m_w<<m_falphabet[i]<<" : "<<m_number[i]<<endl; 73 }
此用以备忘！！！