我遇到以下问题:
当ifstream
无法打开文件时,我将文件拖放到我的工具(exe)
如果我通过控制台手动给它它可以工作!
我不知道差异在哪里,因为我正在切割路径并仅传递文件名
看看代码:
int main(int argc, char* argv[]) {
if (argc < 2) {
cout
<< "ERROR: Wrong amount of arguments! Give at least one argument ...\n"
<< endl;
cout << "\n" << "Programm finished...\n\n" << endl;
cin.ignore();
exit(1);
return 0;
}
vector<string> files;
for (int g = 1; g < argc; g++) {
string s = argv[g];
cout<<"parameter at: " << g << " = " << argv[g] << "\n" << endl;
string filename = "";
int pos = s.find_last_of("\\", s.size());
if (pos != -1) {
filename.append(s.substr(pos + 1));
// cout<<" cutted path: " << s.substr(0,s.size()-filename.size()) << endl;
// cout << "argv[1] " << argv[1] << endl;
cout << "\n filename: " << filename << "\t pos: " << pos << endl;
files.push_back(filename);
}
files.push_back(s);
}
for (unsigned int k = 0; k < files.size(); k++)
{
cout << "files.at( " << k << " ): " << files.at(k).c_str() << endl;
Converter a(files.at(k).c_str());
a.getCommandsFromCSV();
a.saveConvertedFile();
}
cout << "\n" << "Programm finished...\n\n" << endl;
cin.ignore();
return 0;
}
它已经在构造函数上失败了:
Converter::Converter(const char* file) {
filename = file;
myfile.open(filename.c_str(), ios_base::in);
cout << (myfile ? "open successful on constructor " : "some error on constructor");
cin.ignore();
trace_raw = "";
}
你知道为什么吗?
更新
作为参数的文件现在有效。解决方案是离开完整的路径
无论如何,我在硬编码文件上有相同的错误。我认为可能是相同的,这就是为什么我在文件名的开头添加了.\
...但没有成功。
代码:
void GenericCommandConverter::getATCommandsFromCSV() {
cout << "\t| +++++++++++getATCommandsFromCSV() started+++++++++++++ |"
<< endl;
/*
* CSV file name is hardcoded
*/
string filename_csv = ".\\test.csv";
string commands = "";
int pos_start = 0;
int pos_end = 0; // "|"
int substrLength = 0;
int separator_count = 0;
char c;
vector<string> lines;
vector<string> commandList;
vector<vector<string> > linesSeparated;
ifstream csvFile;
csvFile.open(filename_csv.c_str(), ios_base::in);
cout << (myfile ? "open successful on getATCommandsFromCSV " : "some error on getATCommandsFromCSV ");
cin.ignore();
...
UPDATE2: 解决方案是:在将文件删除到exe时,“root”文件夹将更改为删除文件来自的文件夹。给硬编码文件提供* .exe的路径解决了它!
答案 0 :(得分:5)
我猜你当前的目录是错的。不要切断路径。无论如何,你应该做错误检查/调试,看看为什么它无法打开文件。勤勉的调试对于解决问题至关重要,而无需盲目猜测。