/*
  arrays.c

  demonstrates arrays and pointers in C

*/

#include <stdio.h>

void init( int a[] ) {
  int i;
  for ( i=0; i<10; i++ ) {
    a[i] = i;
  }
} // end of init()

void print0( int a[] ) {
  int i;
  printf( "print0: " );
  for ( i=0; i<10; i++ ) {
    printf( "%d ",a[i] );
  }
  printf( "\n" );
} // end of print0()

void print1( int *a ) {
  int i;
  printf( "print1: " );
  for ( i=0; i<10; i++ ) {
    printf( "%d ",a[i] );
  }
  printf( "\n" );
} // end of print1()

void print2( int *a ) {
  int i;
  printf( "print2: " );
  for ( i=0; i<10; i++ ) {
    printf( "%d ",*(a+i) );
  }
  printf( "\n" );
} // end of print2()

void print3( int *a ) {
  int i;
  int *pa = &a[0];
  printf( "print3: " );
  for ( i=0; i<10; i++ ) {
    printf( "%d ",*pa );
    pa++;
  }
  printf( "\n" );
} // end of print3()

void print4( int *a ) {
  int i;
  printf( "print4: " );
  for ( i=0; i<10; i++ ) {
    printf( "%d ",*a );
    a++;	// you can do this here because a is a function variable
  }
  printf( "\n" );
} // end of print4()




main() {

  int a[10];	// declare an array of 10 ints
  int i;

  init( a );

  print0( a );
  print1( a );
  print2( a );
  print3( a );
  print4( a );

  /*
  printf( "print5: " );
  for ( i=0; i<10; i++ ) {
    printf( "%d ",*a );
    a++;	// you cannot do this where a[] was declared
  }
  printf( "\n" );
  */

}