getline

问题 I had a look in other examples but I can't make this one work. I have a file that at some point has weird characters for example : "Äèîpg" I don't want to save this line because it seems that the loop with getline will stop there (it stores until the line with the trash). How could I do it please? I know that when this occurs : "key =0", the next line will have these chars "Äèîpg". Here is my code: file = "example.log"; ifstream f(file); f.open(file); if (f.good()){ while (getline(f, line)) {

问题 am trying to read a file so am doing:- void Load(const char * Name){ fs.open(Name, std::ifstream::in); char temp[256]; if(fs.is_open()){ while (!fs.eof()) { fs.getline(temp , 256); Lines.push_back(new std::string(temp)); } } } but it breaks on the getline -> Unhandled exception at 0x7730B4D9 (ntdll.dll) in GameCore.exe: 0xC0000005: Access violation writing location 0x00000014. where it's check else /* * Not part of _iob[]. Therefore, *pf is a _FILEX and the * lock field of the struct is an

问题 I'm trying to figure out why this is broke now, because I had it working and I'm not sure what is wrong. I'm trying a simple getline from a file that's been opened, however, the compiler keeps giving me errors. I've tried finding someone else with these issues, but I haven't been able to find anyone else with this. Any advice? void Foo::bar(ifstream &inputFile) { // Read in the data, parse it out, and // call loadQueue string input; do { getline(inputFile, input); loadQueue(input); }while (!

问题 Whenever I try to use tellp/g and seekp/g functions on fstream object, and use the fstream::getline(cstr, bufsize) function, it just don't work properly and don't store anything in 'cstr' variable. and it does not report any problem which invalidate the stream like failbit or badbit Sample code: what it does is read it line by line and on each read it jumps to the end of the file and print the next line's offset from the beginning of the file. int main() { // Prepare file fstream f("test.txt"

问题 I am trying to use a text file to initialise a struct that will be used to initialise a 2d vector, yes I know it's complicated but there is going to be a lot of data to work with eventually. The problem is with getline, I have used it this way fine in other code but for some reason it's refusing to work here. I keep getting an argument error and template error. Any hints would be very much appreciated. #include <fstream> #include <string> #include <vector> #include <iostream> using namespace

问题 I'm finding that gcount on an ifstream object after a call to getline(istream &, string &) returns 0. Is this supposed to be the case? 回答1: Yes, gcount() is supposed to return the number of characters extracted by the last unformatted input operation performed on the object. getline() is listed in the functions supposed to updated gcount() , but it is the member getline() of a stream and not the string getline(). In case of doubt, this link tells it black on white: Behaves as

问题 I am new to C++. I am trying to understand how to utilize the C++ common input (cin). I am trying to write a program that checks the amount of characters of the sentence and the amount of vowels in the input sentence. I have successfully done it, but a problem happens when I try to get the code to run through one more time. When it runs through one more time, it doesn't allow second input anymore. My simplified code is below. #include <iostream> #include <string> using namespace std; int main

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Read a password from std::cin Replace input with “ * ” C++ I'm looking for the C/C++ comparable way of doing <input type="password" /> for allowing the user to type in their password after a prompt in a command-line tool written in C. string username; string password; cout << "Username: "; getline(cin, username); cout << "Password: "; [<input type="password" />] getline(cin, password); 来源： https://stackoverflow

问题 I need to use getline() in C, but when i write: #define _GNU_SOURCE #include <stdio.h> #include <stdlib.h> #include <string.h> int main(int argc, char** argv) { char *line; getline(&line, NULL, stdin); free(line); return (0); } compiler writes error: getline was not declared in this scope what can i do? Isn't getline is delared in stdio.h ? I never had this kind of problem before. I use GCC GNU Compiler. 回答1: You need to define _GNU_SOURCE to use this function, either define it before the

问题 I am aware of the common problem with mixing cin and getline. I believe this is different. This is the program: #include <iostream> #include <cstdio> #include <string> using namespace std; int main() { int a; string line; cin >> a; printf("A is '%d'\n", a); getline(cin, line); printf("Line is '%s'\n", line.c_str()); cout << cin.fail() << cin.eof() << cin.bad() << endl; } I also have a version written using istream::getline. I believe the results are the same in all input cases given here. a