Posts by somjit{}

@sepp2k

thats a really helpful explanation. cleared my views a lot :) and yes i now get why the crashes occur.

somjit{} 60 Junior Poster in Training

12 Years Ago

i modified the code a bit further, with the for() loop being

for(i=0;i<10 && ip_num!=0;i++)
{

acc[i]=(ip_num % op_base);
ip_num=ip_num/op_base;
printf("index: %d \n",i);

if(ip_num==0)
break;

if(i==9) {
puts("array acc[] full");
break;

}
}

now, if i put 20,000 decimal, and ask it convert to binary, ie ip_num=20000, op_base=2, then index i goes upto 9, and then the "array acc[] full" statement is printed, and all is ok. that is, the code terminates as is should, without any unexplained crashes or anything.
but without these 3 lines,

    if(i==9) {
    puts("array acc[] full");
    break;

the execution crashes again when i ask to convert 20000 dec to binary.
I only put up these lines after the previous experience with the crashes being cured by a if()-break() statement. i do get a feeling that junk values are taken up by either acc[] or the index i, but exactly which one, where and how that i dont understand yet.

any help on this would be awesome :)

thanks again
somjit.

somjit{} 60 Junior Poster in Training

12 Years Ago

Yeah sorry my wording may have been a bit misleading. The variable i does have a value of 4; however, acc[i] contains a junk value. So what I guess I should have said is that your array "acc" has a junk value at index i and anything past that (since it is not being set anywhere).

and perhaps that junk value was creating problems when the code went to the line printf("%c",base_digits[acc[i]]); and base_digits[] was going out of bounds.

but i still am in doubt as to why that should happen, maybe something's going on underneath, i really cant understand. when break() occurs, i assumed that it would be a clean break(), but clearly it isnt turning out so, and acc[i] is catching a junk value..
just dont understand why it was behaving like that...
and its making my head a less happier place.. :/ :(

somjit{} 60 Junior Poster in Training

12 Years Ago

sfuo

thanks a lot :)
i changed the for() loop like u said and everythings working as it should :)
new for loop:

for(i=0;i<9 && ip_num!=0;i++)
{

acc[i]=(ip_num % op_base);
ip_num=ip_num/op_base;
printf("index: %d \n",i);

if(ip_num==0)
break;
}

however, when i wrote the 1st (faulty) code, i assumed it would work in the following manner when ip_num becomes 0 :

1) for() loop starts, i(lets suppose it was 3 in the prev iteration) gets incremented (thus i=4 now)
2) if() checks ip_num, and ip_num is 0; and hence break executed
3) exit from loop, with i=4
4) this i=4 goes into next for() loop.

however this led to the crash while running the code, and as u said

the first for() loop leaves i at a an index with a junk value since it increments then checks to see if ip_num is 0.

i dont understand why does i get a junk value instead of 4(assumed above)?

would be great if u could help me out again :)

thanks once again
somjit.

somjit{} 60 Junior Poster in Training

12 Years Ago

base conversion problem

problem with code for converting decimal to other bases

when i give any input, a window appears saying "a problem has occured, windows needs to close"

Cprob1

i cant understand what im doing wrong here.
any help will highly appreciated :)

this is my code:

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void main()
{
int ip_num,ip_base,op_num,op_base,i=0, acc[10];

char base_digits[16] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

printf("enter the input number:\n");
scanf("%d",& ip_num);

printf("choose the base to convert to:");
scanf("%d",& op_base);


for(i=0;i<9;i++)
{
if(ip_num==0)
break;
acc[i]=(ip_num % op_base);
ip_num=ip_num/op_base;
}

for(i;i>=0;i--)
{
printf("%c",base_digits[acc[i]]);
}
}

somjit{} 60 Junior Poster in Training

13 Years Ago

thanks caperjack i did read a few wiki links, but still was a bit confused coz it said SO many things there... just wanted to be sure about it. that takes care of my basic queries i guess but one more i wanted to ask is that if i upgrade my pc in the future, and buy a mother board with multiple gpu slots( ie multiple PCIe slots) then can i use SLI(assuming that motherboard will support SLI) with this radeon 6670? i read that u need a SLI version gpu along with a normal gpu, and connect them together to run the two cards as one. can that be done with Radeon HD 6670?

i wrote sli in place of crossfire here!!!! :sad::X really sorry abt that...:(
what i wanted to say is that if in the future i upgrade to a crossfire compatible motherboard, then can i connect my Radeon 6670 with another (crossfire edition) card and run them together? i read something like although the cards need not be exactly the same model(as is the case with SLI) but they have to belong to the same family. this is the link to from where i read it .
The problem is that i dont understand what "belonging to the same family" implies here..

somjit{} 60 Junior Poster in Training

13 Years Ago

thanks caperjack :) i did read a few wiki links, but still was a bit confused coz it said SO many things there... just wanted to be sure about it. that takes care of my basic queries i guess :) but one more i wanted to ask is that if i upgrade my pc in the future, and buy a mother board with multiple gpu slots( ie multiple PCIe slots) then can i use SLI(assuming that motherboard will support SLI) with this radeon 6670? i read that u need a SLI version gpu along with a normal gpu, and connect them together to run the two cards as one. can that be done with Radeon HD 6670?

somjit{} 60 Junior Poster in Training

13 Years Ago

i was reading on the internet that the HD 6670 was a PCIE 2.1 card, but the slot on my motherboard is PCIE 1.0 . can i use this slot for the HD 6670 card? i read somewhere that the PCIE 2.0 slots are backward compatible with PCIE 1.0.??

somjit{} 60 Junior Poster in Training

13 Years Ago

the 6770 model required a 75 watt 6 pin connector. this one doesn't. Also, i read that for the card to perform like it should, the PSU should be able to provide continuous power on its +12V rail. but, as mine came with the cabinet, i don't have any specifications of how much power it can actually give... is there any simple ways i can find that out?? some software maybe?? or with multimeter??

radeon 6670, is it compatible with my system?

somjit{} 60 Junior Poster in Training

13 Years Ago

im planning to buy a graphics card.. as of now, i have none. iv seen the specs of ATI radeon HD 6670 model, and i like it... but a few queries remain.. mainly compatibility oriented.
my system:
CPU- 3.2 GHz AMD Athlon X2 250
2 GB DDR2 800 MHz ram
inbuilt graphics- 256MB GeForce 7025 / NVIDIA nForce 630a (that's what speccy tells me!)
500 watt smps,( nothing extraordinary, just the standard stuff that comes with the cabinet.)

can i run this graphics card on this system? my main cause of worry is all those GDDR5 stuff that i see in its spec sheet. is it that these(the GDDR5 graphics cards) need DDR3 memory to run or something?? or can i run them with DDR2 memory as well?
Really confused :( please help

thanks a lot :)
somjit{}