a problem with the check digi in the isbn prog

[polypic]

this is the first problem set in cs50

i think that ihave a problem with thefor loop
plz help

this is my code for isbn.c

#include <cs50.h>
#include <stdio.h>

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

printf("isbn-num :");
long long isbnum = GetLongLong();
int sum=0;
int i;

for ( i= 10;i>0;i--)

{
int ldigi = (isbnum % 10) ;

isbnum = (isbnum-ldigi);

printf("%d \n",isbnum );


}

}

the code decremented by 9 ? when i give 5641615 the prog give me 5641606
thanx

[Adak]

If you want to "peel off" digits, then replace the subtraction, with division by 10.

[polypic]

whati want to say here that
when there isno for loop
i inter
:11111
gives me
11110
okay

put with the loop gives my some thing like this
even if i`m peeling off digit`s with division by 10


C:\esso>a.exe

isbn-num :11111

1717988029
-257697927
2121713855
1500661574
1438556346
-715137825
-501010513
379395678
37939567
862787415







why ?

[polypic]

up
up
up
up

[Salem]

> int ldigi = (isbnum % 10) ;
> isbnum = (isbnum-ldigi);
So next time around, ldigi will be 0

isbnum /= 10;
is needed as well, if you want to peel each digit off in turn.


> printf("%d \n",isbnum );
It's the wrong format for printing a long long

[polypic]

thanx salem
okay
nowi`m printing long long like this
> printf("%lld \n",isbnum );
but still thesame strange result

[Salem]

Post ALL of your latest code, not one random line.

Also, are you using the Mingw compiler underneath dev-c++ (and perhaps even code::blocks)?
You might have to use the Microsoft format specifiers for long long
Format Specification Fields: printf and wprintf Functions (CRT)

[polypic]

thanx
here is the code

#include <cs50.h>
#include <stdio.h>

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

printf("isbn-num :");
long long isbnum = GetLongLong();
int sum=0;
int i;

for ( i= 10;i>0;i--)

{
int ldigi = (isbnum % 10) ;
isbnum/=10 ;

printf("%lld \n",isbnum );


}

}

& yes i`m using Mingw
i don`t know how to use Microsoft format specifiers for long long ?
thanx

[vart]

microsoft format would be %I64d

[nonoob]

Or %lld works too.

[polypic]

plz help me with this
i can`t get any much farther here is the code

#include <cs50.h>
#include <stdio.h>

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

printf("isbn-num :");
long long isbnum = GetLongLong();
int sum=0;
int i;

for ( i= 10;i>0;i--)

{
isbnum/=10 ;

printf("%I64d \n",isbnum );


}

}

& here is theouput


C:\esso>gcc isbn.c -lcs50

C:\esso>a
isbn-num :454854854
862789023206188871
86278902320618887
8627890232061888
862789023206188
86278902320618
8627890232061
862789023206
86278902320
8627890232
862789023




plz help

[tabstop]

If your for loop only runs 10 times, then you'll only get 10 lines of answers.