Help! help!

[questions]

Tell me what fault it is ?

when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????


#include<stdio. h>
int main()
{ int x,y,z,m,n,w;

printf("Give me an integer\n");
scanf("%d",&x);

y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;

printf("%d %d %d %d %d",y,z,m,n,w );

return 0;}

[Richard Seriani]

Re: Help! help!


"questions" <mengqidhuang@y ahoo.cnwrote in message
news:4ae55173-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com...

Tell me what fault it is ?
>
when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????
>
>
#include<stdio. h>
int main()
{ int x,y,z,m,n,w;
>
printf("Give me an integer\n");
scanf("%d",&x);
>
y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;
>
printf("%d %d %d %d %d",y,z,m,n,w );
>
return 0;}

Convert 12345 to hex.
How many bytes do you need to store that number?
Convert 78569 to hex.
How many bytes do you need to store that number?

How many bytes in an int?

Richard

[Ben Bacarisse]

Re: Help! help!

questions <mengqidhuang@y ahoo.cnwrites:

Tell me what fault it is ?
>
when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????

Not for me. I get 7 8 5 6 9. Presumably your system has INT_MAX less
than mine.

#include<stdio. h>
int main()
{ int x,y,z,m,n,w;

Try "long int" instead.

printf("Give me an integer\n");
scanf("%d",&x);

and "%ld" to match here

y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;
>
printf("%d %d %d %d %d",y,z,m,n,w );

and here.

return 0;}

--
Ben.

[Mark McIntyre]

Re: Help! help!

questions wrote:

when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????
>
>
#include<stdio. h>
int main()
{ int x,y,z,m,n,w;
>
printf("Give me an integer\n");
scanf("%d",&x);

x is too large to fit into an int. if you want numbers greater than the
size of an int on your PC, use a larger type such as long.

Also: don't use scanf - its an unsafe function for beginners due to the
ease with which you can create buffer overruns.

--
Mark McIntyre

CLC FAQ <http://c-faq.com/>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt >

[Bartc]

Re: Help! help!


"questions" <mengqidhuang@y ahoo.cnwrote in message
news:4ae55173-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com...

Tell me what fault it is ?
>
when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????

y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;
>
printf("%d %d %d %d %d",y,z,m,n,w );

Your question has been answered. However, you want to find out how to use
loops more. If you wanted more digits, you'd need a lot more typing with
your method. Just one example of many possibilties:

#include<stdio. h>

/* extract n'th digit of x (right-most is #1) */
int gd(int x, int n)
{ int d=1;

if (x<0) x=-x;
while (--n) d*=10;
return x%(d*10)/d; /* Using your method */
}

int main(void)
{ int i,x;
# define ndigits 5

printf("Give me an integer:\n");
scanf("%d",&x);

for (i=ndigits; i>=1; --i) printf("%d ",gd(x,i));
puts("");

return 0;
}

--
bartc

[questions]

Re: Help! help!

On 10ÔÂ25ÈÕ, ÏÂÎç6ʱ59·Ö, "Richard Seriani" <richard_s...@c ox.netwrote:

"questions" <mengqidhu...@y ahoo.cnwrote in message
>
news:4ae55173-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com...
>
>
>
>
>

Tell me what fault it is ?

>

when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????

>

#include<stdio. h>
int main()
{ int x,y,z,m,n,w;

>

printf("Give me an integer\n");
scanf("%d",&x);

>

y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;

>

printf("%d %d %d %d %d",y,z,m,n,w );

>

return 0;}

>
Convert 12345 to hex.
How many bytes do you need to store that number?
Convert 78569 to hex.
How many bytes do you need to store that number?
>
How many bytes in an int?
>
Richard- Òþ²Ø±»ÒýÓÃÎÄ×Ö -
>
- ÏÔʾÒýÓõÄÎÄ×Ö -

5 bytes

[questions]

Re: Help! help!

On 10ÔÂ25ÈÕ, ÏÂÎç7ʱ20·Ö, Ben Bacarisse <ben.use...@bsb .me.ukwrote:

questions <mengqidhu...@y ahoo.cnwrites:

Tell me what fault it is ?

>

when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????

>
Not for me. I get 7 8 5 6 9. Presumably your system has INT_MAX less
than mine.
>

#include<stdio. h>
int main()
{ int x,y,z,m,n,w;

>
Try "long int" instead.
>

printf("Give me an integer\n");
scanf("%d",&x);

>
and "%ld" to match here
>

y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;

>

printf("%d %d %d %d %d",y,z,m,n,w );

>
and here.
>

return 0;}

>
--
Ben.

thanks,thanks

[questions]

Re: Help! help!

On 10ÔÂ25ÈÕ, ÏÂÎç7ʱ44·Ö, "Bartc" <b...@freeuk.co m>wrote:

"questions" <mengqidhu...@y ahoo.cnwrote in message
>
news:4ae55173-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com...
>

Tell me what fault it is ?

>

when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????
y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;

>

printf("%d %d %d %d %d",y,z,m,n,w );

>
Your question has been answered. However, you want to find out how to use
loops more. If you wanted more digits, you'd need a lot more typing with
your method. Just one example of many possibilties:
>
#include<stdio. h>
>
/* extract n'th digit of x (right-most is #1) */
int gd(int x, int n)
{ int d=1;
>
if (x<0) x=-x;
while (--n) d*=10;
return x%(d*10)/d; /* Using your method */
>
}
>
int main(void)
{ int i,x;
# define ndigits 5
>
printf("Give me an integer:\n");
scanf("%d",&x);
>
for (i=ndigits; i>=1; --i) printf("%d ",gd(x,i));
puts("");
>
return 0;
>
}
>
--
bartc

thank you

[James Kuyper]

Re: Help! help!

questions wrote:

On 10ÔÂ25ÈÕ, ÏÂÎç6ʱ59·Ö, "Richard Seriani" <richard_s...@c ox.netwrote:

>"questions" <mengqidhu...@y ahoo.cnwrote in message
>>
>news:4ae5517 3-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com...
>>
>>
>>
>>
>>

>>Tell me what fault it is ?
>>when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
>>type in is too great ,it'll not give me what I want.For example,if I
>>type 78569,I want to get "7 8 5 6 9",but the result is
>>wrong.why???? ?
>>#include<stdi o.h>
>>int main()
>>{ int x,y,z,m,n,w;
>> printf("Give me an integer\n");
>> scanf("%d",&x);
>> y=x/10000;
>> z=x%10000/1000;
>> m=x%1000/100;
>> n=x%100/10;
>> w=x%10;
>> printf("%d %d %d %d %d",y,z,m,n,w );
>> return 0;}

>Convert 12345 to hex.
>How many bytes do you need to store that number?
>Convert 78569 to hex.
>How many bytes do you need to store that number?
>>
>How many bytes in an int?
>>
>Richard- Òþ²Ø±»ÒýÓÃÎÄ×Ö -
>>
>- ÏÔʾÒýÓõÄÎÄ×Ö -

>
5 bytes

How did you arrive at that conclusion?

It's perfectly possible for the size of an int to be 5 bytes, but
extraordinarily unlikely. Given that your program didn't work as you
intended, it's certainly not the case on your machine.

[Ben Bacarisse]

Re: Help! help!

James Kuyper <jameskuyper@ve rizon.netwrites :

questions wrote:

>On 10月25日, 下午6时59分 , "Richard Seriani" <richard_s...@c ox.netwrote:

<snip>

>>How many bytes in an int?

<snip>

>5 bytes

>
How did you arrive at that conclusion?
>
It's perfectly possible for the size of an int to be 5 bytes, but
extraordinarily unlikely. Given that your program didn't work as you
intended, it's certainly not the case on your machine.

Nit: that can't be deduced as certain. sizeof(int) can be 5 and still
have too few value bits to represent the larger of two numbers
originally presented (as I am sure you know).

--
Ben.

[mason]

Re: Help! help!

On 10ÔÂ25ÈÕ, ÏÂÎç6ʱ45·Ö, questions <mengqidhu...@y ahoo.cnwrote:

Tell me what fault it is ?
>
when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
type in is too great ,it'll not give me what I want.For example,if I
type 78569,I want to get "7 8 5 6 9",but the result is
wrong.why?????
>
#include<stdio. h>
int main()
{ int x,y,z,m,n,w;
>
printf("Give me an integer\n");
scanf("%d",&x);
>
y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;
>
printf("%d %d %d %d %d",y,z,m,n,w );
>
return 0;}

int ai=12345;
int b1,b2,b3,b4,b5;

b5=ai/10000;
b4=(ai%10000)/1000;
b3=((ai%10000)% 1000)/100;

b2=((ai%10000)% 1000)%100/10;

b1=((ai%10000)% 1000)%100%10/1;

printf("\n%d \t%d \t%d \t%d \t%d\t",b1,b2,b 3,b4,b5);

[Tony Quinn]

Re: Help! help!

In message
<4ae55173-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com>,
questions <mengqidhuang@y ahoo.cnwrites

>Tell me what fault it is ?
>
>when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
>type in is too great ,it'll not give me what I want.For example,if I
>type 78569,I want to get "7 8 5 6 9",but the result is
>wrong.why??? ??
>
>
>#include<stdio .h>
>int main()
>{ int x,y,z,m,n,w;
>
printf("Give me an integer\n");
scanf("%d",&x);
>
y=x/10000;
z=x%10000/1000;
m=x%1000/100;
n=x%100/10;
w=x%10;
>
printf("%d %d %d %d %d",y,z,m,n,w );
>
return 0;}

Even I, as a rank amateur beginner, know this ...... the number that
you're inputting (78569) is larger than "int" on your system (where as
12345 isn't to big). I suspect that "int" on your system contains 8 bits
and can have a maximum of 32767, even *if* you were using "unsigned int"
you could input a maximum value of 65535 before overflow occurred

I think that you might need the data type "long". But of course I may
be wrong. It has been known
--
If one person has delusions, we call them psychotic. If, however, 1.5 billion
people have delusions we must apparently call them a religious group, and
respect their delusionary state.

[Lew Pitcher]

Re: Help! help!

On October 26, 2008 10:52, in comp.lang.c, Tony Quinn (tony@tqvideo.c o.uk)
wrote:

In message
<4ae55173-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com>,
questions <mengqidhuang@y ahoo.cnwrites

>>Tell me what fault it is ?
>>
>>when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
>>type in is too great ,it'll not give me what I want.For example,if I
>>type 78569,I want to get "7 8 5 6 9",but the result is
>>wrong.why???? ?

[snip]

Even I, as a rank amateur beginner, know this ...... the number that
you're inputting (78569) is larger than "int" on your system (where as
12345 isn't to big). I suspect that "int" on your system contains 8 bits

ITYM 16 bits. 8 bits would only give a range of -128 to 127 (for signed
integer) or 0 - 255 (for unsigned integer)

and can have a maximum of 32767, e

Even *if* you were using "unsigned int"
you could input a maximum value of 65535 before overflow occurred
>
I think that you might need the data type "long". But of course I may
be wrong. It has been known

--
Lew Pitcher

Master Codewright & JOAT-in-training | Registered Linux User #112576
http://pitcher.digitalfreehold.ca/ | GPG public key available by request
---------- Slackware - Because I know what I'm doing. ------

[Tony Quinn]

Re: Help! help!

In message <a4233$49048663 $4c0a8c26$30318 @TEKSAVVY.COM-Free>, Lew
Pitcher <lpitcher@teksa vvy.comwrites

>On October 26, 2008 10:52, in comp.lang.c, Tony Quinn (tony@tqvideo.c o.uk)
>wrote:
>

>In message
><4ae55173-d77a-4f5b-930e-8e49aa139647@z6 g2000pre.google groups.com>,
>questions <mengqidhuang@y ahoo.cnwrites

>>>Tell me what fault it is ?
>>>
>>>when I type 12345,it'll give me "1 2 3 4 5",but when the integer I
>>>type in is too great ,it'll not give me what I want.For example,if I
>>>type 78569,I want to get "7 8 5 6 9",but the result is
>>>wrong.why??? ??

>[snip]

>Even I, as a rank amateur beginner, know this ...... the number that
>you're inputting (78569) is larger than "int" on your system (where as
>12345 isn't to big). I suspect that "int" on your system contains 8 bits

>
>ITYM 16 bits. 8 bits would only give a range of -128 to 127 (for signed
>integer) or 0 - 255 (for unsigned integer)
>

>and can have a maximum of 32767, e

>

>Even *if* you were using "unsigned int"
>you could input a maximum value of 65535 before overflow occurred
>>
>I think that you might need the data type "long". But of course I may
>be wrong. It has been known

See I told you that I'm a beginner and can be wrong, but my line of
thinking is correct (range overflow), is it not?

--
A 'Project Manager' is someone who, when told that the aircraft in which
he is currently a passenger is about to crash, demands that the pilot
stops all that tiresome struggling-with-the-controls-in-the-cockpit
stuff and instead attends a half-hour-long impact-assessment meeting.

[James Kuyper]

Re: Help! help!

Ben Bacarisse wrote:

James Kuyper <jameskuyper@ve rizon.netwrites :
>

>questions wrote:

>>On 10月25日, 下午6时59分 , "Richard Seriani" <richard_s...@c ox.netwrote:

<snip>

>>>How many bytes in an int?

<snip>

>>5 bytes

>How did you arrive at that conclusion?
>>
>It's perfectly possible for the size of an int to be 5 bytes, but
>extraordinaril y unlikely. Given that your program didn't work as you
>intended, it's certainly not the case on your machine.

>
Nit: that can't be deduced as certain. sizeof(int) can be 5 and still
have too few value bits to represent the larger of two numbers
originally presented (as I am sure you know).

Yes, I wasn't thinking about that. Demote that possibility from
"certain" to "nearly certain".