/* FILE: randStrings3.cpp   last change: 23-Jan-2013   author: Romeo Rizzi
 * This program generates 3 random strings.
 * Usage syntax:
 *   > randStrings3.cpp n1 n2 n3  MIN_CHAR MAX_CHAR seed
 * where n1, n2 and n3 are the lengths of the 3 strings but when n3 = -1
 * then the third string is just the concatenation of the first two.
 * Usage example:
 *   > randStrings3 10 10 10 A Z 777
 */

#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

const int MAX_N1 = 1000, MAX_N2 = MAX_N1;
char s1[MAX_N1], s2[MAX_N2];

int RandNumber(int min, int max) {
  /* returns an integer in [min, max]
   * see Stroustrup "The c++ Programming Language" 3th edition pg. 685
   * for comments on the following manipulation choice.
   * In particular, considerations on the bad quality of low bits come into account.
   */
  return min + (int) ( (max-min +1) * (double( rand()-0.000000000001 ) / RAND_MAX ) );
}



int main(int argc, char** argv) {
  srand(time(NULL));
  int n1, n2, n3 = -1;
  char MIN_CHAR = 'A', MAX_CHAR = 'B';
  n1 = atoi(argv[1]); n2 = atoi(argv[2]);
  if(argc > 3) n3 = atoi(argv[3]);
  if(argc > 4) MIN_CHAR = argv[4][0];
  if(argc > 5) MAX_CHAR = argv[5][0];
  if(argc > 6) srand( atoi(argv[6]) );

  cout << n1 << " " << n2 << " " << ( (n3 < 0) ? n1+n2 : n3 ) << endl;
  for(int i = 1; i <= n1; i++)
    cout << ( s1[i-1] = (char) RandNumber( (int) MIN_CHAR, (int) MAX_CHAR) );
  cout << endl;
  for(int i = 1; i <= n2; i++)
    cout << ( s2[i-1] = (char) RandNumber( (int) MIN_CHAR, (int) MAX_CHAR) );
  cout << endl;
  if( n3 >= 0 )
    for(int i = 1; i <= n3; i++)
      cout <<  (char) RandNumber( (int) MIN_CHAR, (int) MAX_CHAR);
  else {
    for(int i = 1; i <= n1; i++)
      cout << s1[i-1];
    for(int i = 1; i <= n2; i++)
      cout << s2[i-1];
  }
  cout << endl;

  return 0;
}