ifstream

[Solved] C++: Trying to read from a file line by line, saving into a vector and then printing the vector prints nothing

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You could – after skipping the line count – read in each individual character and compare it to ‘0’ or ‘1’. See the following code: int main() { vector<bool> bits; ifstream f(DATAFILE); if (f.is_open()) { int dummy; f >> dummy; char c; while (f >> c) { if (c == ‘1’) { bits.push_back(true); } else … Read more

[Solved] Should C++ file read be slower than Ruby or C#?

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Based on the comments and the originally posted code (it has now been fixed [now deleted]) there was previously a coding error (i++ missing) that stopped the C++ program from outputting anything. This plus the while(true) loop in the complete code sample would present symptoms consistent with those stated in the question (i.e. user waits … Read more

[Solved] How to extract a multiline text segment between two delimiters under a certain heading from a text file using C++ [closed]

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After taking a closer look at reading text files in C++, I settled on this passable but most likely far from ideal solution: #include <iostream> #include <fstream> #include <string> using namespace std; int main() { string TextFile; cout << “Enter the wordlist to search:” << “\n”; getline(cin, TextFile); string Search; int Offset = 0; int … Read more

[Solved] C++ does not name a type error in Codeblocks [duplicate]

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You can’t put arbitrary statements at the file scope in C++, you need to put them in a function. #include <string> #include <fstream> #include <streambuf> #include <sstream> int main () { //These are now local variables std::ifstream t(“C:/Windows/System32/drivers/etc/hosts-backup.txt”); std::stringstream buffer; //We can write expression statements because we’re in a function buffer << t.rdbuf(); } 4 … Read more