Thread: read a line from file

Hi...

I have a file myfile:
Fri Apr 01 23:28:17 SGT 2005,hello
Fri Apr 01 23:28:22 SGT 2005,how
Fri Apr 01 23:28:22 SGT 2005,are
Sat Apr 02 01:34:03 SGT 2005,you
Sat Apr 02 01:34:07 SGT 2005,?

How can i read a particular line from it?
I tried to use this to read the first line:

Code:

char line[64];
FILE *f = fopen("myfile", "rw");

fscanf(f, "%s\n", &line);

But it does not work. The string is empty...

Anyone know how to do? Thank you.

Well when you use fscanf with a char array u can just send the variable not the address.

Code:

fscanf(f, "%s", line);

That will only read until it reaches white space so Fri will be put into line.

If you want to read an entire line into an array of 64 use fgets

Code:

while(fgets(line, 63, f) != 0){}

That will read the entire file line by line.

Originally Posted by stumpster123

Well when you use fscanf with a char array u can just send the variable not the address.

Code:

fscanf(f, "%s", line);

That will only read until it reaches white space so Fri will be put into line.

If you want to read an entire line into an array of 64 use fgets

Code:

while(fgets(line, 63, f) != 0){}

That will read the entire file line by line.

It seems that i can only read the first word Fri from the first line...

And i dont know how long the line is, so i also cannot use fgets..

How can i do? Thank you..

suppose u wanted to do xyz to each line...

Now try proceeding this way :

1 - open the file.

2 - Do till EOF is reached

get character and put it in an array till the '\n' character is reached.
U've got ur string. Do xyz to it.

Sorry ! Got the point !