Ofstream not writing to file C++
c++, file, io, ofstream
Solution
You did not provide enough information to answer the question with certainty, but here are some of the issues you might be facing:
You did not flush the buffer of the `ofstream`
You did not close the file that you are trying to open later on (if I'm correct, `outputFile` is a global variable, so it is not closed automatically until the end of the program)
Problem
I have this method which supposed to get a buffer and write some content to a file: ``` void writeTasksToDevice() { TaskInfo *task; unsigned int i = lastTaskWritten; printf("writing elihsa\n"); outputFile.write(" Elisha2", 7); //pthread_mutex_lock(&fileMutex); for(; i < (*writingTasks).size(); i++) { task = (*writingTasks).at(i); if(NULL == task) { printf("ERROR!!! in writeTasksToDevice - there's a null task in taskQueue. By " " design that should NEVER happen\n"); exit(-1); } if(true == task->wasItWritten) { //continue; } else // we've found a task to write! { printf("trying to write buffer to file\n"); printf("buffer = %s, length = %d\n", task->buffer, task->length);<====PRINT HERE IS OK< PRINTING WHAT IS WANTED outputFile.write(task->buffer, task->length); <===SHOULD WRITE HERE printf("done writing file\n"); } } //pthread_mutex_unlock(&fileMutex); // TODO: check if we should go to sleep and wait for new tasks // and then go to sleep } ``` the buffer content is: task->buffer: `elishaefla` task->length: `10` i opened the stream in another init function using: ``` outputFile.open(fileName, ios :: app); if(NULL == outputFile) { //print error; return -1; } ``` but at the end, the file content is empty, nothing is being written. any idea why?