Bar code reader

nerovin · 03-25-2010, 11:59 AM

HI!

I have a assignment relating to barcode reading.Let say i have to enter the 13 digit barcode with hyphen e.g "Enter barcode:123-46574-48847" using scanf.Once thats done how do i extract the values without the hyphen
e.g using printf "1234657448847". No arrays No strings and No function is allowed.
No while loop is allowed

The lecturer's tip was to treat "-" as negative and not hyphen.

So how do i go about in solving this problem?.

Maligree · 03-25-2010, 12:44 PM

Bleh, homework.

Not sure I understood, though. Would this piece of code be of any help to you?

Code:

#include <stdio.h>

int main(int argc,char **argv) {

    char str[]="123-46574-48847";
    int a,b,c,d,e,f;

    sscanf(str,"%d-%d-%d",&a,&b,&c);
    sscanf(str,"%d%d%d",&d,&e,&f);
    printf("%d %d %d\n",a,b,c);
    printf("%d %d %d\n",d,e,f);

    return 0;
}

michaelk · 03-25-2010, 12:59 PM

Per the LQ Rules, Do not expect LQ members to do your homework - you will learn much more by doing it yourself.. We're happy to assist if you have specific questions or have hit a stumbling point, however. Let us know what you've already tried and what references you have used (including class notes, books, and Google searches) and we'll do our best to help. Also, keep in mind that your instructor might also be an LQ member.

I have asked that this thread be moved to a more appropriate forum.

nerovin · 03-25-2010, 06:37 PM

As to this question i actually did 3/4 of my work. i just need the last piece to solve my problem.Let me explain what i did so far sudo code

int main(int argc, char*argv[])
{
long long bar;
printf("Enter the barcode:");
scanf("%lld", &bar);

printf("Barcode is %03lld-%06lld-%03lld-%01lld\n",
bar(first3digit),(BAR2(the next5digit),Bar3(The next3 digit),Bar4(the last digit));

This program scans the 12digit number and once that done what i did was to separate the 12 digit number accordingly to the barcode e.g 123456789012 to 123-45678-901-2

its all good from here. The problem i'm facing is that now someone input numbers and hyphens into my program
e.g 123-45678-901-2 how do i convert it back to 123456879012 with without char str,no strings,no arrays,nofunction. Just by using scanf to convert it back

Sergei Steshenko · 03-25-2010, 07:11 PM

Quote:

Originally Posted by nerovin

As to this question i actually did 3/4 of my work. i just need the last piece to solve my problem.Let me explain what i did so far sudo code

int main(int argc, char*argv[])
{
long long bar;
printf("Enter the barcode:");
scanf("%lld", &bar);

printf("Barcode is %03lld-%06lld-%03lld-%01lld\n",
bar(first3digit),(BAR2(the next5digit),Bar3(The next3 digit),Bar4(the last digit));

This program scans the 12digit number and once that done what i did was to separate the 12 digit number accordingly to the barcode e.g 123456789012 to 123-45678-901-2

its all good from here. The problem i'm facing is that now someone input numbers and hyphens into my program
e.g 123-45678-901-2 how do i convert it back to 123456879012 with without char str,no strings,no arrays,nofunction. Just by using scanf to convert it back

Why not 'printf' to convert it back to number ?