Page 394 - Programming Microcontrollers in C

The printout() and the printafter() Functions 379

{
char na[ALEN],nu[NLEN];
int i,j,k,count=0;

if(LIST_ENTRIES==0)
return; /* no entries */
k=START_OF_LIST;
do
{
i=epro->header[k].dataindex;
j=decode(&epro->data[i],na);
puts(na);
putbcd(&epro->data[i+j+1],nu);
puts(nu);
k=epro->header[k].next;
count++;
}
while(count<LIST_ENTRIES && count<DLEN);
}

Listing 7-14: The printout() Function
Listing 7-15 contains the printafter() routine. Here, the
routine cycles through the data, decodes it and prints it out one Entry
at a time. In this case, the parameter k is static and it starts with the
value 0. This is the value of the index to the first Entry in the array.
After each output, k is incremented and so is count. Whenever
count attains the value LIST_ENTRIES, all of the data in the
memory has been printed out. Then count is restored to 0 along
with the value of k being set to 0. This action causes the data in the
array to be printed out one field at a time and when all of the data are
sent out, it is restored to the beginning of the array and recycled.

#include “phone.h”

void printafter(Epro *epro)
{
char na[ALEN],nu[NLEN];
int j,i;
static k=0,count=0;