Programming Forums > Application Development > C

bivhitscar · Oct 31st, 2005, 11:58 PM

This code is supposed to read values (type double) from user input and place them in an array, using a loop. Easy? No, apparantly not, here's the code:

(Toggle Plain Text)

#include <stdio.h>

int main(void)
{
  double user[8];         //user's chosen numbers
  int i;                  //loop counter for user entered numbers

  for(i = 0; i <= 7; i++)
  {
    printf("Enter a number (%d to go): ", 8 - i);
    scanf("%lf", &user[i]);

  }

  return 0;
}

When I run this, I enter my first number and get this error:

Runtime error R6002
- floating point not loaded

Googled the error, but didn't get anything very definitive.

But if I use scanf to read the number to 'temp' then on the next line read 'temp' into user[i] - it works fine.

(Toggle Plain Text)

scanf("%lf", &temp);
user[i] = temp;

It also worked if I just added a line right after scanf, printing what the value of i and user[i] was.

(Toggle Plain Text)

scanf("%lf", &user[i]);
printf("user[%d] = %f", i, user[i]);

I can't figure out why this doesn't work.

And if anyone has issues with me using scanf(), I already know there's better options, but I'm learning from a book and I should technically be able to do this.

InfoGeek · Nov 1st, 2005, 12:24 AM

Works for me. gcc version 3.2.2.
Specify your OS/compiler.

bivhitscar · Nov 1st, 2005, 12:30 AM

Bah, it had to be microsoft's fault. I'm using the VC++ 2003 toolkit.

InfoGeek · Nov 1st, 2005, 12:30 AM

I think it was a problem with some old compilers when the floating point emulator routine wasn't loaded and one tried to use the address of floating point numbers. Not sure though.

bivhitscar · Nov 1st, 2005, 12:31 AM

Oh, on windows xp.

InfoGeek · Nov 1st, 2005, 12:33 AM

Try to run the executable from outside the development environment and see if the error pops up again.

bivhitscar · Nov 1st, 2005, 12:35 AM

Oh, I don't have the whole suite, I'm just using the free tools they provide. Basically it's the .net compiler/linker without the ide.

InfoGeek · Nov 1st, 2005, 12:52 AM

I found it here

bivhitscar · Nov 1st, 2005, 1:47 AM

So, I found out how to fix the problem on my own anyway? Go me.

Thanks for that link though, the M$ article I found listed about 7 different reasons as to why it could be happening.

Oct 31st, 2005, 11:58 PM	#1
bivhitscar Hobbyist Programmer Join Date: Oct 2005 Location: Melbourne, Australia Posts: 126 Rep Power: 3	Problems reading a double into an array using scanf() This code is supposed to read values (type double) from user input and place them in an array, using a loop. Easy? No, apparantly not, here's the code: (Toggle Plain Text) #include <stdio.h> int main(void) { double user[8]; //user's chosen numbers int i; //loop counter for user entered numbers for(i = 0; i <= 7; i++) { printf("Enter a number (%d to go): ", 8 - i); scanf("%lf", &user[i]); } return 0; } #include <stdio.h> int main(void) { double user[8]; //user's chosen numbers int i; //loop counter for user entered numbers for(i = 0; i <= 7; i++) { printf("Enter a number (%d to go): ", 8 - i); scanf("%lf", &user[i]); } return 0; } When I run this, I enter my first number and get this error: Runtime error R6002 - floating point not loaded Googled the error, but didn't get anything very definitive. But if I use scanf to read the number to 'temp' then on the next line read 'temp' into user[i] - it works fine. (Toggle Plain Text) scanf("%lf", &temp); user[i] = temp; scanf("%lf", &temp); user[i] = temp; It also worked if I just added a line right after scanf, printing what the value of i and user[i] was. (Toggle Plain Text) scanf("%lf", &user[i]); printf("user[%d] = %f", i, user[i]); scanf("%lf", &user[i]); printf("user[%d] = %f", i, user[i]); I can't figure out why this doesn't work. And if anyone has issues with me using scanf(), I already know there's better options, but I'm learning from a book and I should technically be able to do this. __________________ it's ironic considerate rarity patron of love higher knowledge engulfs me...

Nov 1st, 2005, 12:24 AM	#2
InfoGeek Professional Programmer Join Date: Jun 2005 Location: India, The great. Posts: 435 Rep Power: 4	Works for me. gcc version 3.2.2. Specify your OS/compiler. __________________ PFO - My daily dose of technology.

Nov 1st, 2005, 12:30 AM	#3
bivhitscar Hobbyist Programmer Join Date: Oct 2005 Location: Melbourne, Australia Posts: 126 Rep Power: 3	Bah, it had to be microsoft's fault. I'm using the VC++ 2003 toolkit. __________________ it's ironic considerate rarity patron of love higher knowledge engulfs me...

Nov 1st, 2005, 12:30 AM	#4
InfoGeek Professional Programmer Join Date: Jun 2005 Location: India, The great. Posts: 435 Rep Power: 4	I think it was a problem with some old compilers when the floating point emulator routine wasn't loaded and one tried to use the address of floating point numbers. Not sure though. __________________ PFO - My daily dose of technology.

Nov 1st, 2005, 12:31 AM	#5
bivhitscar Hobbyist Programmer Join Date: Oct 2005 Location: Melbourne, Australia Posts: 126 Rep Power: 3	Oh, on windows xp. __________________ it's ironic considerate rarity patron of love higher knowledge engulfs me...

Nov 1st, 2005, 12:33 AM	#6
InfoGeek Professional Programmer Join Date: Jun 2005 Location: India, The great. Posts: 435 Rep Power: 4	Try to run the executable from outside the development environment and see if the error pops up again. __________________ PFO - My daily dose of technology.

Nov 1st, 2005, 12:35 AM	#7
bivhitscar Hobbyist Programmer Join Date: Oct 2005 Location: Melbourne, Australia Posts: 126 Rep Power: 3	Oh, I don't have the whole suite, I'm just using the free tools they provide. Basically it's the .net compiler/linker without the ide. __________________ it's ironic considerate rarity patron of love higher knowledge engulfs me...

Nov 1st, 2005, 12:52 AM	#8
InfoGeek Professional Programmer Join Date: Jun 2005 Location: India, The great. Posts: 435 Rep Power: 4	I found it here __________________ PFO - My daily dose of technology.

Nov 1st, 2005, 1:47 AM	#9
bivhitscar Hobbyist Programmer Join Date: Oct 2005 Location: Melbourne, Australia Posts: 126 Rep Power: 3	So, I found out how to fix the problem on my own anyway? Go me. Thanks for that link though, the M$ article I found listed about 7 different reasons as to why it could be happening. __________________ it's ironic considerate rarity patron of love higher knowledge engulfs me...

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Programming Forums > Application Development > C

Problems reading a double into an array using scanf()