demultiplexor.c
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#include <stdio.h>
#include <string.h>
#include "auxiliar.h"
int main(int argc, char **argv)
{
int i;
int j;
if(argc != 2)
{
error();
}
char *input = argv[1];
if(!strcmp(input,"error"))
{
error();
}
char **inputs = comma_separate(input);
if(inputs == NULL)
{
error();
}
int num_inputs = num_occurrences(input,',');
if(num_inputs != 2)
{
error();
}
int input_length = strlen(inputs[0]);
int selected = bin2dec(inputs[1]);
int num_outputs = 0x1 << strlen(inputs[1]);
for(i = 0; i < num_outputs; i++)
{
if(i == selected)
{
printf("%s",inputs[0]);
}
else
{
for(j = 0; j < input_length; j++)
{
printf("0");
}
}
if(i != (num_outputs-1))
{
printf(",");
}
}
free_mem(inputs,num_inputs);
return 0;
}