problem working with memory in c

[mempal]

hello friends,
i am new to c language and currently working with memory.i have a file and i need to copy certain data from the file to a memory location.thanks in advance..

[Ganon11]

OK, so what problems are you experiencing? What have you tried to fix this problem? We need more details of your situation before we can help you.

[mempal]

thanks.i am posting the code.
itoa(x,tidd,10);
mem=x;
mem=(char *)malloc(size);
fseek(fp,start,SEEK_SET);
for(i=start;i<=end;i++)
{
t=fgetc(fp);
strcpy(mem,t);
}

[mempal]

hi i am working on creating dns sessions.i have a input file containing all dns query and responses.i need to load the queries to diff memory and load them back to another file.i have 3 questions.
1.How to write from a file to memory
2.i need diff memory locations.how to create them
3.how to write from a memory location to a file.