Question

I am writing a program in C++, which requires me to read an input text file using command line argument.

However, I am using xcode on my Macbook to write C++ program, and use terminal instead of command.

How do you use int main(int argc, char** argv[]) to read an input file. My professor requires us not to hard code the text file name like .open("example.txt");

Thank you!

Answer 1

Try this program, it takes input from command line.

#include <iostream>

using namespace std;

int main(int argc, char*argv[]){

cout << "The file name is: "<<argv[1]<<endl;

// YOU CAN DO open(argv[1])

return 0;

}

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SEE OUTPUT

PLEASE COMMENT if there is any concern.

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