老派:-)

std::string str = "H:/recursos/audio/youtube/libre/falta/"; 

for (int i = 0; i < str.size(); i++) {
    if (str[i] == '/') {
        str[i] = '\\';
    }
}

std::cout << str;

结果:

点:youtube \ resources \音响\ \‘\ \缺失

Abseil StrReplaceAll怎么样?在头文件中:

// This file defines `absl::StrReplaceAll()`, a general-purpose string
// replacement function designed for large, arbitrary text substitutions,
// especially on strings which you are receiving from some other system for
// further processing (e.g. processing regular expressions, escaping HTML
// entities, etc.). `StrReplaceAll` is designed to be efficient even when only
// one substitution is being performed, or when substitution is rare.
//
// If the string being modified is known at compile-time, and the substitutions
// vary, `absl::Substitute()` may be a better choice.
//
// Example:
//
// std::string html_escaped = absl::StrReplaceAll(user_input, {
//                                                {"&", "&"},
//                                                {"<", "&lt;"},
//                                                {">", "&gt;"},
//                                                {"\"", "&quot;"},
//                                                {"'", "&#39;"}});

我想我也会加入促进方案:

#include <boost/algorithm/string/replace.hpp>

// in place
std::string in_place = "blah#blah";
boost::replace_all(in_place, "#", "@");

// copy
const std::string input = "blah#blah";
std::string output = boost::replace_all_copy(input, "#", "@");

一个简单的查找和替换单个字符是这样的:

s.find("x")， 1， "y")

要对整个字符串执行此操作，最简单的方法是循环，直到s.find开始返回npos。我认为您还可以捕获range_error来退出循环，但这有点丑陋。

老派:-)

std::string str = "H:/recursos/audio/youtube/libre/falta/"; 

for (int i = 0; i < str.size(); i++) {
    if (str[i] == '/') {
        str[i] = '\\';
    }
}

std::cout << str;

结果:

点:youtube \ resources \音响\ \‘\ \缺失

这个工作!我在书店应用程序中使用了类似的方法，其中库存存储在CSV(类似于.dat文件)中。但在单字符的情况下，意味着替换者只是一个单字符，例如'|'，它必须在双引号"|"中，以避免抛出无效的转换const char。

#include <iostream>
#include <string>

using namespace std;

int main()
{
    int count = 0;  // for the number of occurences.
    // final hold variable of corrected word up to the npos=j
    string holdWord = "";
    // a temp var in order to replace 0 to new npos
    string holdTemp = "";
    // a csv for a an entry in a book store
    string holdLetter = "Big Java 7th Ed,Horstman,978-1118431115,99.85";

    // j = npos
    for (int j = 0; j < holdLetter.length(); j++) {

        if (holdLetter[j] == ',') {

            if ( count == 0 ) 
            {           
                holdWord = holdLetter.replace(j, 1, " | ");      
            }
            else {

                string holdTemp1 = holdLetter.replace(j, 1, " | ");

                // since replacement is three positions in length,
                // must replace new replacement's 0 to npos-3, with
                // the 0 to npos - 3 of the old replacement 
                holdTemp = holdTemp1.replace(0, j-3, holdWord, 0, j-3); 

                holdWord = "";

                holdWord = holdTemp;

            }
            holdTemp = "";
            count++;
        }
    } 
    cout << holdWord << endl;
    return 0;
}

// result:
Big Java 7th Ed | Horstman | 978-1118431115 | 99.85

我目前使用CentOS，所以我的编译器版本如下。c++版本(g++)， c++ 98默认值:

g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.