Little help?

**dwks** · 05-04-2006

Code:

 invalid operands of types `const char[12]' and `char[200]' to binary `operator+' 

--- on # line
(filename = "characters\\" + cfullname +".html";)

You need to use strcat for char arrays, or strings:

Code:

(filename = string("characters\\") + cfullname + string(".html");

or

Code:

filename = "characters";
filename += cfullname;
filename += ".html";

**SilverWolfe** · 05-04-2006

Thanks that worked perfectly! i know i think i'm being a bother... and i hate to ask this (hopefully) last question.. as i was continuing on with the program, while waiting for replies i came up with another problem... (( it would seem every 30 lines i run into another problem... ))

I'm back at the dice rolls that were random between 10 and 20... based off the rolls and why i needed them into variables.. depending on the roll i want to add to it.. in a string like:
if roll is a 10 i want to append 10-0 and thats how it would look on the html file and 11 and 12 ... -1 11-1//12-1 ect all the way up to 20-5

so if the rolls are
12
14
11
20
19
16
10

the output would read

12-1
14-2
11-1
20-5
19-5
16-3
10-0

i tried a few pssobilties, but i keep getting the erros cannont covert bewtween char and int.. the char being '-' also those -3, -4 i want to be added like the above, the some of those is '17'... any ideas on this part..

(( i hope this is the last thing wrong with the code...... I'm fairly new to c++ i have worked with it before.. but this is something my friend requested...
i do thank you all for the help.))

**whiteflags** · 05-04-2006

I just have a question. Why is it important to format the dice roll this way? Is the second number random like the first? I've not seen a 20-sided die before.

**Bench82** · 05-04-2006

Originally Posted by citizen

I just have a question. Why is it important to format the dice roll this way? Is the second number random like the first? I've not seen a 20-sided die before.

You've obviously not played enough role playing games

**SilverWolfe** · 05-04-2006

its just the way we play... it adds to armor... and no that number is not random its acorrding to the first random number if its 10 -0 is appendded to it..
10-0
11 12 -1
13 14 -2
15 16 -3
17 18 -4
19 20 -5

like that...

**whiteflags** · 05-04-2006

well here's what I would do. Not sure if you'd like it, but Prelude taught me how to deal with random numbers. You should probably learn about what I'm doing.

Code:

#include <iostream>
#include <cstdlib>

using namespace std;

// This function helps seed rand() more properly
unsigned time_seed(void)
{
  time_t now = time ( 0 );
  unsigned char *p = (unsigned char *)&now;
  unsigned seed = 0;
  size_t i;

  for ( i = 0; i < sizeof now; i++ )
    seed = seed * ( UCHAR_MAX + 2U ) + p[i];

  return seed;
}

// This function just makes sure that we don't make other rolls 
// occur more common than others
double uniform_distribution (int seed)
{
   return seed * 1. / (RAND_MAX + 1.);
}

int main(void) 
{
   const char *die[10] = 
   { "10-0", "11-1", "12-1", "13-2", "14-2", "15-3", 
     "16-3", "17-4", "18-4", "19-5", "20-5" };

   srand(time_seed());

// Now, the dice roll still works the same, except you are working 
// within the bounds of a string array.
   int r =  uniform_distribution(rand()) * 10;
   cout << die[r];

   cin.get();

   return 0;
}

**Bench82** · 05-05-2006

There's a much simpler way which doesn't involve translating the dice roll to a string - look at this psuedo-program:

Code:

int main ()
{    
    int x = // Some number from 10 to 20;
    x = (x-9)/2;
    cout << x;
}

**whiteflags** · 05-05-2006

Right Bench! Wow, that was neat... of course there was nothing wrong with my solution, it just looks complex because that's how I learned random numbers. My only criticism is that you overwrote the value for x. Shouldn't it be?

Code:

int die = 10 + uniform_distribution(rand()) * (10-20); // some random number 10 to 20;
cout << die << "-" << (die-9)/2 << "\n";

**Bench82** · 05-05-2006

Originally Posted by citizen

. My only criticism is that you overwrote the value for x. Shouldn't it be?

Yep, you're right, I should have stored the result in another variable instead of overwriting x. my arithmetic is sometimes better than my programming

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