User input in a system("wget")

[TKESuperDave]

Currently I'm attempting to get a webpage that the user inputs using a system call. However I can't get the system call with the user's inputted website working.

My program looks like this:

 #include <iostream>
  #include <string>
  int system(const char *command);

    int main()
   {
      string website;
      cout<<"Enter a website that you want to grab: ";
      cin>>website;
  
      int get=system ("wget "+website);
      return get; 
   }

Desired output:
Enter a website that you want to grab: www.yahoo.com

With the index.html of yahoo put in the directory the program is being run in.


Any help would be greatly appreciated.

[magicalblender]

What is the purpose of this line?

int system(const char *command);

Tell me more about your problem. Is it not compiling? If it compiled correctly, what happens when you run it? Does it crash, hang, or just display nothing?

[magicalblender]

It seems as though system() won't accept a string as an argument- you must supply a pointer to a const char. That's fine- we'll use c_str() to convert the string to a c-style string, and then cast it into a const char*.

int main()
{
	std::string website;
	std::cout<<"Enter a website that you want to grab: ";
	std::cin>>website;
	std::string command = "wget " + website;
	system((const char*)command.c_str());
}

Don't forget your "std::"s, also.

[ropez]

There's no reason to cast command.c_str() to a const char*, it already of that type, this would be fine:

system(command.c_str());

Also, you should not declare system(const char*) yourself, but include <cstdlib> instead.