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Reading from a file.

Can someone show me the code that does the following simple task:
a program that reads the number on the last line from a file "junk.txt", increments that number and stores the result on a new line at the bottom of the file. (let's assume that the file initially contains one line with the number "0").
Thanks.

ASKER CERTIFIED SOLUTION

Kent Olsen

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mkandre

please clarify your question, are u just readind one number from file then writing the new value to a new line?

if so, then here's an example:

/*Assuming file already exists*/
/* First open file */
fptr=fopen("junk.txt","r+");

/*Asuming the contains integer character*/
/*Read value from last line*/
do
{
fscanf(fptr,"%d",value);
}
while(!feof);

/*Write new value to file in new line*/
fprintf(fptr,"\n%d",value);

/*This is just a code sample, you will need to do the rest.
I cannot give you the entire code.
you will need to create a loop to control the function
if you plan to read and write more than one value.*/

mkandre

homerz

ASKER

Ok first of all thanks for ur help.
I did write a code and everything is working just fine except that im not able to write to the file.
The problem is as follows: lets say i have the following:
FILE *fp;
fp= open("fgetsc.txt","r");
char test= '1';

Now i want to add the character "test" on a new line in the file that initially contains let's say one character on the first line. How can i do that?

SOLUTION

sunnycoder

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