How do you read strings from a file...?

jpxtreme · #1 26-Sep-2006, 21:20

Hello everyone, I just would like to ask some questions regarding the FILE output/input. I was able to write strings on a file using fprintf, but how can i read all the strings that i had inserted on it? Is it possible to use looping statements? Could you kindly give me some examples please?

And one more questions, how do you pick strings on a file randomly? say, i have inputted 10 words on the file and wanted to pick 5 random words. Is it possible? it would be great if you kindly post some examples... Sorry i am still learning C. Thanks in advance and God bless to you all!

niek_e · #2 27-Sep-2006, 01:21

say you called your FILE* fFile, you could try something like this:

CPP / C++ / C Code:

char acBuffer[50]; //fill in the size as big as you need it


// fgets returns NULL at the end of the file
while (fgets( acBuffer, 50, fFile ) != NULL) 
{
    printf("Read from file: %s\n", acBuffer)

}

jpxtreme · #3 27-Sep-2006, 02:31

Thanks for the reply, it helps me alot. But how do you pick the words from a file randomly?

baccardi · #4 27-Sep-2006, 03:12

read all the strings to the array and then choose 5 of them randomly

jpxtreme · #5 28-Sep-2006, 04:40

Hi, there. I tried to read all the strings from the file using for loop but it only reads the first line only. I can retrieve all strings from the file by manually read them one by one. How do you read all the strings using loop? Sorry for being a noob.

baccardi · #6 28-Sep-2006, 07:30

the byte's value -1 denotes the end of the file. So when i find this byte in the text i know that it's the end of the file.

davekw7x · #7 28-Sep-2006, 10:55

Quote:

Originally Posted by jpxtreme

Hi, there. I tried to read all the strings from the file using for loop but it only reads the first line only. I can retrieve all strings from the file by manually read them one by one. How do you read all the strings using loop? Sorry for being a noob.

In the first response to this thread, niek_e gave an example of a loop that reads multiple lines from the file. Did you try something like that?

If you didn't, that may be OK (that's probably one of the better ways, but there are other ways). How can we tell why your method didn't work if we don't know what you tried.

In other words: Show Us Some Code.

Regards,

Dave

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How do you read strings from a file...?

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