词频统计

#include<iostream> #include<fstream> #include<string> #include <iomanip> using namespace std; string stringtrim(string s) { int i=0; while (s[i]=='\"'||s[i]=='\''||s[i]==','||s[i]=='.'||s[i]=='?')//开头处为‘"',.?，则跳过 { i++; } s=s.substr(i); i=s.size()-1; while(s[i]=='\"'||s[i]=='\''||s[i]==','||s[i]=='.'||s[i]=='?')结尾处为空格Tab,.?，则跳过 { i--; } s=s.substr(0,i+1); return s; } void main() { ifstream fin; fin.open("in.txt",ios::in); if(!fin.is_open()) { cout << "打开输入文件错误"; exit (1); } else {} ofstream fout; fout.open("out.txt",ios::out | ios::trunc); if(!fout.is_open()) { cout << "打开输出文件错误"<<endl; exit (0); } else {} string words[1000]; int num[1000]; string temps; int tempn; int i,j; i=0; int sign; while (!fin.eof()) { fin>>temps; temps=stringtrim(temps); sign=0; for(j=0;j<=i;j++) { if(temps==words[j]) { num[j]++; sign=1; break; } } if(sign==0) { words[i]=temps; num[i]=1; i++; } } fin.close(); for(int m=1;m<i;++m) { for(int n=0;n<m;++n) { if(words[m]<words[n]) { temps=words[n]; words[n]=words[m]; words[m]=temps; tempn=num[n]; num[n]=num[m]; num[m]=tempn; } } } for(j=0;j<i;j++) { cout<<setw(20)<<setiosflags(ios::left)<<words[j]<<num[j]<<endl; fout<<setw(20)<<setiosflags(ios::left)<<words[j]<<num[j]<<endl; } fout.close(); }