regex_replace 函数

最新推荐文章于 2025-03-15 13:31:40 发布

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最新推荐文章于 2025-03-15 13:31:40 发布

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分类专栏：正则表达式

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      // std_tr1__regex__regex_replace.cpp 
// compile with: /EHsc 
#include <regex> 
#include <iostream> 
 
int main() 
    { 
    char buf[20]; 
    const char *first = "axayaz"; 
    const char *last = first + strlen(first); 
    std::regex rx("a"); 
    std::string fmt("A"); 
    std::regex_constants::match_flag_type fonly = 
        std::regex_constants::format_first_only; 
 
    *std::regex_replace(&buf[0], first, last, rx, fmt) = '\0'; 
    std::cout << "replacement == " << &buf[0] << std::endl; 
 
    *std::regex_replace(&buf[0], first, last, rx, fmt, fonly) = '\0'; 
    std::cout << "replacement == " << &buf[0] << std::endl; 
 
    std::string str("adaeaf"); 
    std::cout << "replacement == " 
        << std::regex_replace(str, rx, fmt) << std::endl; 
 
    std::cout << "replacement == " 
        << std::regex_replace(str, rx, fmt, fonly) << std::endl; 
 
    return (0); 
    } 
 

     
     
    
    
   
   
  
  
<span id="mt23" class="sentence" data-guid="0ec2a73fd7a67cad7903a59a5c4d96ee" data-source="" replacement="=" axayaz"="" xml:space="preserve">替换 AxAyAz ==
替换 Axayaz ==
替换 AdAeAf ==
替换 Adaeaf ==

 
     // std_tr1__regex__regex_replace.cpp 
// compile with: /EHsc 
#include <regex> 
#include <iostream> 
 
int main() 
    { 
    char buf[20]; 
    const char *first = "axayaz"; 
    const char *last = first + strlen(first); 
    std::regex rx("a"); 
    std::string fmt("A"); 
    std::regex_constants::match_flag_type fonly = 
        std::regex_constants::format_first_only; 
 
    *std::regex_replace(&buf[0], first, last, rx, fmt) = '\0'; 
    std::cout << "replacement == " << &buf[0] << std::endl; 
 
    *std::regex_replace(&buf[0], first, last, rx, fmt, fonly) = '\0'; 
    std::cout << "replacement == " << &buf[0] << std::endl; 
 
    std::string str("adaeaf"); 
    std::cout << "replacement == " 
        << std::regex_replace(str, rx, fmt) << std::endl; 
 
    std::cout << "replacement == " 
        << std::regex_replace(str, rx, fmt, fonly) << std::endl; 
 
    return (0); 
    } 
 
 
    

替换 AxAyAz ==
替换 Axayaz ==
替换 AdAeAf ==
替换 Adaeaf ==