Password Generator

password.cpp

#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <cassert>

int main( int argv, char *argc[] ) {
  assert( argv > 1 );
  const int N = atoi( argc[ 1 ] ); // Password length
  char i, randChar;

  srand( time( NULL ) ); // Initialize random seed
  for ( i = 0; i < N; ++i ) {
    randChar = rand() % 36;

    if ( randChar < 10 ) {
      printf( "%c", randChar + '0' ); // [0-9]
    }
    else {
      printf( "%c", randChar - 10 + 'a' ); // [a-z]
    }
  }
  printf( "\n" );

  return 0;
}