string 字串替換

原文地址：http://www.vimer.cn/2009/11/string%E6%9B%BF%E6%8D%A2%E6%89%80%E6%9C%89%E6%8C%87%E5%AE%9A%E5%AD%97%E7%AC%A6%E4%B8%B2%EF%BC%88c%EF%BC%89.html

#include   <string>

#include   <iostream>

using   namespace   std;

string    replace_all(string    str,const   string    old_value,const   string    new_value)                                                                                     

{                                                                                                                                                                                

while(true)   {                                                                                                                                                              

string::size_type   pos(0);                                                                                                                                              

if(   (pos=str.find(old_value))!=string::npos   )                                                                                                                        

            str.replace(pos,old_value.length(),new_value);                                                                                                                       

else   break;                                                                                                                                                            

    }                                                                                                                                                                            

return   str;                                                                                                                                                                

}

string    replace_all_distinct(string    str,const   string    old_value,const   string    new_value)                                                                            

{                                                                                                                                                                                

for(string::size_type   pos(0);   pos!=string::npos;   pos+=new_value.length())   {                                                                                          

if(   (pos=str.find(old_value,pos))!=string::npos   )                                                                                                                    

            str.replace(pos,old_value.length(),new_value);                                                                                                                       

else   break;                                                                                                                                                            

    }                                                                                                                                                                            

return   str;                                                                                                                                                                

}

int   main()                                                                                                                                                                     

{                                                                                                                                                                                

    cout   <<   replace_all(string("12212"),"12","21")   <<   endl;                                                                                                              

    cout   <<   replace_all_distinct(string("12212"),"12","21")   <<   endl;    

　　

                          

完