I want to make copies of the exe file itself multiple times. I tried the following code: #include <fstream> #include <string> int main() { std::ifstream from("main.exe", std::ios::binary); auto buf { from.rdbuf() }; for(int x { 0 }; x <= 10; ++x) { std::string name { "main" + std::to_string(x) + ".exe" }; std::ofstream out(name, std::ios::binary); out… Read More How to make copies of the executable itself in C++?
Here is an example struct: struct Person { std::string Name; int Age; }; And Here is how i write it to an fstream: Person p; p.Name = "Mike"; p.Age = 21; stream.write((char*)&p, sizeof(p)); As you can see above I write my Person variable to an fstream using write() function. Person’s name is written to the… Read More How does an std::string field in a struct gets written to an std::fstream?
When trying to use fstream to enter csv data into my program I am having an odd problem using a vector but it works fine with a random-sized array. I am not sure why but the error I am getting from visual studio is that there is no suitable conversion from string to char even… Read More Sorting my file of strings into my vector thinks I am trying to put characters in it?
I need to read in a line from a file in c++ but need to save two strings as one. For example, if the the files line had someones name like Bernie Sanders, I would want to save the entire name into a string variable instead of just the first name. >Solution : I assume… Read More I am using the ifstream function in c++ and I need to save two words as one string instead of splitting them
There is a txt file that contains the following data: the name of a city a temperature in the city, measured in celsius for example London 3 Washington 11 Budapest 3 London 5 Budapest 30 Washington 11 London 15 Budapest 7 How can I calculate each city’s average temperature. Can I somehow sort it and… Read More sorting by strings in c++
Why this function read files wrong? In buff after read last symbols contain garbage values. Does it related with memory alignment? I know about more safe std::string and rdbuff(), but I want to understand how work C-style strings. char * read_from_file(const char * path) { std::ifstream fin(path); if (fin) { fin.seekg(0, fin.end); size_t length =… Read More C++ istream::read
For what every reason, my program is filling up 4GB of space on my drive. Why I narrowed down to this for loop using break points. The code thats doing this: int blockPos = 1; char blockAddressPos = 0x00; for (int d = 0; d < img.width * img.height * img.channels; d++) { tf.write(blockPos, blockAddressPos,… Read More Why is fstream put function filling 4GB of space on my drive?