Convert command line argument to string

Question

I have a program that reads hard-coded file-path and I want to make it read file-path from command line instead. For that purpose I changed the code like this:

#include <iostream>  int main(char *argv[]) { ... } 

but, argv[1] variable exposed this way seems to be of type pointer, and I need it as a string. What should I do to convert this command line argument to string?

Answer 1

It's already an array of C-style strings:

#include <iostream> #include <string> #include <vector>   int main(int argc, char *argv[]) // Don't forget first integral argument 'argc' {   std::string current_exec_name = argv[0]; // Name of the current exec program   std::vector<std::string> all_args;    if (argc > 1) {     all_args.assign(argv + 1, argv + argc);   } } 

Argument argc is count of arguments plus the current exec file.

Answer 2

You can create an std::string

#include <string> #include <vector> int main(int argc, char *argv[]) {   // check if there is more than one argument and use the second one   //  (the first argument is the executable)   if (argc > 1)   {     std::string arg1(argv[1]);     // do stuff with arg1   }    // Or, copy all arguments into a container of strings   std::vector<std::string> allArgs(argv, argv + argc); }