Hey, guys. I am writing single program, which should replace 10th,11th and 12th character in file with "A" . Problem is, that my program will just write thos A's at the end of the file. Could you,please help me? Thanks in advance.
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
int main(int argc, char **argv)
{
int des,l,k;
char buf;
des = open("tmp",O_CREAT|O_APPEND|O_RDWR,S_IRUSR|S_IWUSR);
if (l = lseek(des,10L,SEEK_SET)== -1)
{
perror("lseek()");
return (des);
} //get to the position 10
else
{
for (k=0;k<3;k++)
{
write(des,"A",1);
}
} //write AAA
read(des,&buf,1);
printf("%c",buf); //checking
return 0;
}
