sscanf() for just one field

David Crow

9ine wrote:

sscanf(str,"%s %s %s",0,0,tmp);

Use:

sscanf(str, "%*s %*s %s", tmp);

9ine wrote:

it produces exception in this case

As it should since you are trying to write to address 0.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

9ine

that is the nice one. I have not seen it in sscanf documentation

9ine

Zac Howland

9ine wrote:

Consider if I need to read 20th field from a string I dont want to declare int num1,num2,num3,num4, ........... num20 to read last field :-)

sscanf isn't the right function for doing this. And using the %s option for sscanf isn't advised since it will almost never do what you hope it will. In fact, only your first %s will be read in and you will corrupt memory with the other 2 (even after fixing your references to the variables). If you are looking to access a single (or even a few) elements in a delimited string, write a split method, or use strtok to march through the array to the elements you want to access.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac

Sebastian Schneider

I did not know sscanf could do that. Wow. I am gonna remove all stringstreams from my code, right now ;)

Cheers, Sebastian -- Contra vim mortem non est medicamen in hortem.

kakan

Or like this. N.B. Add error handling as required! char str[] = "field1 field2 field3 ..." // only one field3 string using sscanf() and one buffer for it - tmp. char * cpLastSpace = strrchr(str, (int) ' '); // Find the last space in str if(NULL != cpLastSpace) { sscanf(cpLastSpace+1,"%s",tmp); // Or strcpy(tmp, cpLastSpace+1); }

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

toxcct

Sebastian Schneider wrote:

I am gonna remove all stringstreams from my code, right now

are you serious :~ C++ classes are much prefered than C functions dude!

TOXCCT >>> GEII power

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kakan

Nice. I didn't know that either.

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Zac Howland

Sebastian Schneider wrote:

Wow. I am gonna remove all stringstreams from my code, right now

I do hope you were being sarcastic :-P sscanf is great when parsing typed information ... it is not very useful for trying to extract substrings.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac

9ine

yeah. david crow rulez

9ine

Sebastian Schneider

toxcct wrote:

are you serious

Hrhr.

Cheers, Sebastian -- Contra vim mortem non est medicamen in hortem.

Sebastian Schneider

I was. Oh, and I noticed 2 typos in your Signature:

Zac Howland wrote:

...for 8 hours a day, 5 days a week

should be

experience tells us:

...for 11 hours a day, 6 days a week

Cheers, Sebastian -- Contra vim mortem non est medicamen in hortem.

Zac Howland

Just checking ... And I've thought about changing it to say "at least 8 hours ... 5 days" since my old job fit the 20 hour/7 day mold.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac

Sebastian Schneider

Gotta loooooove crunch-time...

Cheers, Sebastian -- Contra vim mortem non est medicamen in hortem.

Zac Howland

Oh no. That was normal operating procedure ... When crunch time came around, the managers would pressure us to spend the night in the office ... even over weekends!

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week Zac