double number to string

[khadimhussain]

Robert i used function filetoarray to convert a file like this

12.23547

14.777777777

1.3325

222.368

12.3235

robert i used then arraytofile function to write these values in file.

sir is there any way when i use filetoarray function i pick ist values from above file in array.

or similearly i pick last 3 values in array?

actualy i have to pick data from different files and write in to one file at specific positions. from one file i have to write ist 4 values at diffenent position and last 4 on different.

[khadimhussain]

i used read a line function alright and done my task with that also. but i dnt know how to bring my pointer on back after endoffile

[RobertoBozzolo]

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khadimhussain ha scritto:

Robert i used function filetoarray to convert a file like this

12.23547

14.777777777

1.3325

222.368

12.3235

robert i used then arraytofile function to write these values in file.

sir is there any way when i use filetoarray function i pick ist values from above file in array.

or similearly i pick last 3 values in array?

actualy i have to pick data from different files and write in to one file at specific positions. from one file i have to write ist 4 values at diffenent position and last 4 on different.

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There is no way to customize FileToArray behaviour to operate as you want. Consider this function as an express way of reading a file, easy to use but rigid. If you need some more specialized task you must program it by yourself.

[RobertoBozzolo]

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khadimhussain ha scritto:

i used read a line function alright and done my task with that also. but i dnt know how to bring my pointer on back after endoffile

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Depending on the family of functions you use there is a specific file positioning function to use: fsetpos for ANSI C library functions, SetFilePtr for Formatting and I/O Library functions (which seems to be your case).

[blakney]

If you don't care about speed to much just close the file and then reopen it. This is a quite a hack though.

Robert is correct to say use setfileptr (if used the NI function OpenFile and are working with an int file handle) or fsetpos (if you use AMSI C fopen and have ptr to FILE as a handle).

[khadimhussain]

hi i read the help of symbol asterik * but still dsnt understand properly. kindly give me some example code of fmt in which use asterik and explain me that code. i could understand uptill now that * will  be used instead of rep after % for example %*i but unable to use that comand i tried different things

for example i have

int array[8]={1,2,3,4,5,6,7,8};

Fmt (buf, "%s<%*i", array);

i could understand this but this is not working. what modifications i needed to convert array in to strings

[RobertoBozzolo]

When you put an asterisk in the format string, a corresponding argument must exist in the argument list.

That is, the line should read: Fmt (buf, "%s <%*i", 8, array);

[blakney]

You will need to Google "use of pointers in ANSI C code". You will need to practice and devote some trime to this concept in order  to do this correctly. Nobody can give you a one sentence answer to this. It is also really beyond the scope of a discussion forum.

[khadimhussain]

Roberto what will 8 do in that comand? i want to clear my concept means if i have array size 100 but i put only values up to 4th index than what value i will use at the place of 8.

[khadimhussain]

sir blanky i m working hard and i will read pointers but you guys are amazing and i feel so helpful to you all of them