C code to read last line from a text file

[shan14]

Hi

I have to write some data into text file. The data is some thing like this

Integer: 1107, float: 53.141590,A character: s
Integer: 1109, float: 53.141591,A character: c
Integer: 1110, float: 53.141593,A character: f
Integer: 1111, float: 53.141594,A character: B

Now After writing this into the text file; I have to read the last line from that text file and display it.

I having problem in reading the last line, because all int,float,char are present. I don't know How to read all that at once??

I just want the last line as the output.
i.e. Integer: 1111, float: 53.141594,A character: B

so can anyone help me with C code?

 

[FvM]

To extract lines of formatted text, you don't care for the content, just scan for <CR><LF> (dos/windows) respectively <LF> only (unix/linux files). If you don't scan the complete file, make an assumption about maximum line length, read a block starting n characters before the file end until the end, reverse scan the block for line formatting characters.

 

[doraemon]

Hello!

Is this code running on a microcontroller?
Is it a plain C program on a PC?
In the latter case, you can use simple stdio functions such as scanf.

Dora.

 

[betwixt]

And, maybe set the file pointer to the end and work backwards to save time if it's a big file.

Brian.

 

[shan14]

Hi

Thanks for your replies, it was very helpful
Now I have problem with writing into text file.

I have to take values from user. values are in the format
107 53.14 sdf
154 45.32 adsf ............... so on
suppose 10 values

Now I have to write these values into text file .
So, how to write these values which are taken from user into text file.