ifstream

Implicit instantiation of undefined template 'std::basic_ifstream<char,std::char_traits<char>>' #ifndef MAPPER_H #define MAPPER_H #include <iostream> #include <string> #include <vector> #include "KeyValue.h" #include "Parser.h" using namespace std; class Mapper { public: Mapper(ifstream& infile); ~Mapper(void); void loadTokens(); void showTokens(); void map(); void printMap(); void printMap(string map_fileName); private: ifstream inFile; //<-- is where the error is happening vector<string> tokens; vector<KeyValue> map_output; Parser* parser; }; #endif I've even tried putting std::ifstream and

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Experimenting with I/O I get an exception where no exception should have been thrown: #include #include int main() { std::ifstream f("/tmp"); std::cout > std::ws) std::cout But the output is: Exception Flags: 0 terminate called after throwing an instance of 'std::ios_base::failure' what(): basic_filebuf::underflow error reading the file Aborted g++ (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2 Edit The test is supposed to fail without exception: From 27.5.5.4 basic_ios flags functions void clear(iostate state = goodbit); 4 Postcondition: If rdbuf()!

Here is my code: #include <string> #include <iomanip> #include <fstream> #include <iostream> #include <cstring> #include <cctype> using namespace std; // include .h file that holds function ot write header #include "WriteE3RptHdr.h" // declare global constant const int NUM_QTS = 15; // declare struct to hold info on student and answers struct StudRpt { char answers[NUM_QTS]; string firstName; string lastName; char answerKey[NUM_QTS]; string testKey; string testData; }; StudRpt Data; // function prototypes StudRpt StoreAnswerKey(StudRpt Data, ifstream inFile); StudRpt StoreStudData(StudRpt Data

I'm trying to make a program that will be able to both create a .txt file and reads from it to create output for tic-tac-toe meant for Linux. However, one of my functions is not initializing it's first parameter, the input stream from the file in question, in order to create the output needed. The function prototype: void loadSquaresFromStream( ifstream inStream, char statusSquare[], int currGame, int row, int column, int mark, int player, int games_Left ); // This function reads from the file 'games.txt' and uses it to update the array // used to output each game. The function head and body:

I have a text file, "test.txt" which stored my data as follow, there's a spacing between each delimiter field.. Code: Name: Coy 045: Ted: Coy1 054: Red: Coy2 How do i read this data from file and insert this into a vector? vector <Machine> data; Machine machine void testclass(){ ifstream inFile("test.txt"); if (!inFile){ cout << "File couldn't be opened." << endl; return; } while(!inFile.eof()){ string code,name,coy; getline(inFile,code, ':'); getline(inFile,name, ':'); getline(inFile,coy, ':'); data.push_back(machine) } but it seems to have a problem with pushing the data As others have