appending a int to a variable in a loop?

[wario]

say i run my app.

prog.exe test1 test2 test3

to save using..

string arg1=argv[1] etc etc

how can i use this loop to append "i" to the end of "arg"..

for(int i=1;i<argc;i++)
{
string arg? = argv[i];
}

? should be the number of "i".
how can i add this to the end of "arg" ?
thanks

[confuted]

You can use an array of strings. That's all you can do.

[alpha]

You can use the resize() function of the string class. i.e.

#include <iostream>
#include <string>

int main() {
  string arg;
  int i;
  int argv[50];

  for(i = 0; i < 50; i++) {
    arg.resize(arg.length() + 1);
    arg[arg.length() - 1] = argv[i];
  }

  return 0;
}

I haven't tested it, but I think it should work. I hope this was what you were looking for.

[Zach L.]

Just looking at that (I'm too lazy to test for sure at the moment), I don't think that'll do what you want.

The operator[] for std::string returns a reference to a character. Assigning that character to an int will cause the int to be cast to a char (simply truncated if necessary), and then you'll end up appending the character corresponding to that number in the ASCII table.

There is an IntToString function in the FAQ (here), and then you could simply use the operator+= for string.

[Zach L.]

Hmm... Looking back at the question (and blackrat's reply), I think something more like this is what your looking for:

std::vector<std::string> arg(argc);

for(int i = 0; i < argc; ++i)
{
   arg[i] = argv[i];
}

[alpha]

wow, I completely forgot about that. Geeze, not a good day for me.