How to get the file_name in C++ if I executed my program with ./program_name<file_name

Question

if I was executing the program like this: ./program_name<file_name How would I get the file_name in c++.

I tried to use argue[1] in the main and open file eg.

int main(int argc, char *argv[]){
    ifstream file;
    file.open(argv[1],ios::in);
}

its not opening

Answer 1

The < operator cat the file in input and you try in your code to get it from parameter. If you want to use input:

#include <string>

int main() {
    std::string data;
    // here you read all the file
    std::getline(std::cin, data);
}