文件替换子字符串

#include <fstream>//ifstream读文件，ofstream写文件，fstream读写文件

#include <string>//文本对象，储存读取的内容
#include <iostream>//屏幕输出cout
#include <cstdlib>//调用system("pause");
#include <windows.h>//用于函数SetConsoleOutputCP(65001);更改cmd编码为utf8
using namespace std;
void replaceAllStr(string& str)
{
    string strName = "stroke=\"";
    int nLenName = strName.length();
    string strEnd = "\"";
    string strreplace = strName + string("black")+ strEnd +string(" ");
    int nReplacelen = strreplace.length();
    string strTemp = str;
    string str2 = str;
    int nTotalIndex = 0;
    while (true)
    {
        int nPos1 = strTemp.find(strName);
        if (nPos1 == strTemp.npos) break;
        string strTemp2 = strTemp.substr(nPos1+ nLenName, strTemp.length()-(nPos1 + nLenName));
        int nPos2 = strTemp2.find(strEnd);
        if (nPos2 == strTemp.npos) break;
        int strokeAlllen = (nPos2 + 1) + nLenName;
        nTotalIndex += nPos1;

        str.replace(nTotalIndex, strokeAlllen, strreplace);
        nTotalIndex += nReplacelen;
        strTemp = str.substr(nTotalIndex,str.length()- nTotalIndex);
    }
}
int main()
{
//    string str = "12 stroke=\"12\">1234 stroke=\"3456\">12 stroke=\"12\">1234 stroke=\"3456\">12 stroke=\"12\">1234 stroke=\"3456\">12 stroke=\"12\">1234 stroke=\"3456\">";
//    replaceAllStr(str);
//    cout << str << endl;
//    system("pause");
//    return 0;
    GetTickCount()
    SetConsoleOutputCP(65001);
    ifstream in("D:\\clq\\weixin_file\\WXWork\\1688853094618981\\Cache\\File\\2020-10\\123\\14334451-1-40611184.svg");
    string line;
    ofstream outfile("D:\\clq\\weixin_file\\WXWork\\1688853094618981\\Cache\\File\\2020-10\\123\\temp.svg");
    if (in) // 有该文件
    {
        while (getline(in, line)) // line中不包括每行的换行符
        {
        //    cout << "-------------------" << endl;
        //    cout << line << endl;
            
            replaceAllStr(line);
        //    if（line.find("")
            outfile << line << "\n";
        //    cout << line << endl;
        //    cout << "-------------------" << endl;
        }
    }
    else // 没有该文件
    {
        cout << "no such file" << endl;
    }
    outfile.close();
    in.close();
    system("pause");
    return 0;

}

 

void replaceAllStr2(string& str, string strName = "stroke=\"none\"", string strReplace = "stroke=\"black\"")
{
    int strokeAlllen = strName.length();
    int nReplacelen = strReplace.length();
    string strTemp = str;
    int nTotalIndex = 0;

    while (true)
    {
        int nPos1 = strTemp.find(strName);
        if (nPos1 == strTemp.npos) break;
        nTotalIndex += nPos1;
        str.replace(nTotalIndex, strokeAlllen, strReplace);
        nTotalIndex += nReplacelen;
        strTemp = str.substr(nTotalIndex, str.length() - nTotalIndex);
    }
}
//示例调用
string str = "12 stroke=\"none\">1234 stroke=\"3456\">";
    replaceAllStr2(str);
    cout << str << endl;
    system("pause");