C++ C++；用文件名追加路径

我正在尝试附加保存文件的路径以及文件名。下面是我的代码

int main() 
{
cout << "Please enter the name of the file: ";
string fileName;
getline(cin, fileName);
ifstream file("C:\\Users\\Faisal\\Desktop\\Programs\\"+fileName.c_str(), ios::in);
string line;
for (int count = 1; !file.eof(); ++count) 
{
    getline(file, line);
    cout << line << endl;
    if (count % 24 == 0) system("Pause");
}
   system("Pause");
}

---

c字符串没有+运算符。您的代码正试图添加指针。@drescherjm否我想从路径打开我的文件使用std:：string变量进行字符串连接。+将在那里工作。@drescherjm

ifstream文件（“C:\\Users\\Faisal\\Desktop\\Programs\\”+std:：string（fileName.C_str（）），ios:：in）

给我

[错误]没有匹配的函数调用'std:：basic\u ifstream:：basic\u ifstream（std:：basic\u string，const openmode&'）

你确定文件不是

ali.txt

？

int main() 
{
cout << "Please enter the name of the file: ";
string fileName;
string pathName = "C:\\Users\\Faisal\\Desktop\\Programs\\";
getline(cin, fileName);
string fileToOpen = pathName + fileName;
ifstream file(fileToOpen.c_str());

if (!file){

// There was an error so display an error

// message and end the PROGRAM.

cout << "Error opening " << fileName << endl;

exit(EXIT_FAILURE);

}
string line;
for (int count = 1; !file.eof(); ++count) 
{
    getline(file, line);
    cout << line << endl;
    if (count % 24 == 0) system("Pause");
}
   system("Pause");
}

Please enter the name of the file: ali
Error opening ali