Just a tiny question.

[td0g03]

Hey guys, thank for the help before and maybe you can help me a little more :-).

Here is the question they are asking...

"Write a statement that reads a floating point (real) value from standard input into temperature. Assume that temperature. has already been declared as an double variable."

I been trying to figure out what it means. I tried scanf, but just get some error message. Any help would be great. Thanks.

Oh btw this isn't a homework question. I been using this site to help me learn C++ the site is turingscraft.

[horace1]

Hey guys, thank for the help before and maybe you can help me a little more :-).

Here is the question they are asking...

"Write a statement that reads a floating point (real) value from standard input into temperature. Assume that temperature. has already been declared as an double variable."

I been trying to figure out what it means. I tried scanf, but just get some error message. Any help would be great. Thanks.

post your code an we can try to figure out what is wrong

[td0g03]

post your code an we can try to figure out what is wrong

Well, I tried these..

 
printf("%f",temperature);
 
and I tried
 
scanf("%f",temperature);
 
and I even messed around and gave temperature a value of 10.
 

I just don't really understand what they are asking for exactly. I hope that helps...

[horace1]

Well, I tried these..

 
printf("%f",temperature);
 
and I tried
 
scanf("%f",temperature);
 
and I even messed around and gave temperature a value of 10.
 

I just don't really understand what they are asking for exactly. I hope that helps...

when scanf() converts characters into a numeric value it has to return that value into the variable. To do this it need the address in memory of the variable. To pass the address you use the & (address of operator), e.g.

  scanf("%f",&temperature);   // ** & added
 

[td0g03]

when scanf() converts characters into a numeric value it has to return that value into the variable. To do this it need the address in memory of the variable. To pass the address you use the & (address of operator), e.g.

  scanf("%f",&temperature);   // ** & added
 

Hello, I also had tried the & and I believe I got the error "Suggestion: You changed temperature, but did not read a value into it."

So would I have to put something like temperature = 10 is that "reading a value into it."

[horace1]

Hello, I also had tried the & and I believe I got the error "Suggestion: You changed temperature, but did not read a value into it."

So would I have to put something like temperature = 10 is that "reading a value into it."

try this program which reads a value from the keyboard and returns it into the variable temperature

#include <stdio.h>
 
int main()
{
  float temperature; 
  scanf("%f",&temperature);   // ** & added
  printf("%f\n",temperature);
  system("pause");
}
 

[td0g03]

try this program which reads a value from the keyboard and returns it into the variable temperature

#include <stdio.h>
 
int main()
{
  float temperature; 
  scanf("%f",&temperature);   // ** & added
  printf("%f\n",temperature);
  system("pause");
}
 

Hello, that works in my c++ program, but not for the website. I have to put

[code]
scanf("%f",&temperature);
printf("%f\n",temperature);
[code\]

You changed temperature, but did not read a value into it.
Unexpected identifiers: printf
Write a single statement, performing the input as directed.

The site asks
Write a statement that reads a floating point (real) value from standard input into temperature. Assume that temperature. has already been declared as an double variable.

I know scanf and printf does what the first line asks for, but could've the site have a grammar error or temperature. <<notice the period must be included in the code?

I'm sorry if this is confusing as I am confused as well.

[horace1]

what exactly are you trying do, i.e. what is the specification of the program? what website are you talking about?

[td0g03]

what exactly are you trying do, i.e. what is the specification of the program? what website are you talking about?

Hello, the website I am using is www.turingscraft.com

You have some sort of instant message program I can send you my print screen of or I'll just find a website to host it.

Thanks again!

[nareddyt]

After a few hours of research, I figured out the correct code:

scanf("%lf",&temperature);

[johny10151981]

what compiler are you using??

Don't say you are compiling on that site. its not a very good answer.

follow the link
to get a detail of scanf string format.

%lf is used for double
%f is for float

[nareddyt]

@johny10151981
I'm using Pelles C.

You would use %lf, because it the prompt says "temperature" has been declared as a double...

[Heather34]

scanf ("%lf", &temperature);