Unix---System Call

[srinidelite]

Hello everybody,
the below program is given for us in the class for practical........but i dint able to understand any single line........especially bolder and underlined texts

1...normally in we'll use #include<stdio.h> in c...where as in c++ ..#include<iostream.h>....but what this new header files>>>?

2....what is syntax..stands for ??bolder text area's

#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>
int main()
{
char buf[10];
char b[]="MASTER OF COMPUTER APPLICATION";
int fd;
if((fd=open("system.txt",O_RDWR|O_CREAT,S_IRUSR|S_IWUSR|S_IXUSR))>0)
printf("\n file opened \n");
printf("%d",fd);
if(write(fd,b,30)>0)
printf("\n written to the file");
if(lseek(fd,10,SEEK_SET)>0)
printf("\n cursor positioned \n");
if(read(fd,buf,8)>0)
printf("\n read success \n");
write(1,buf,8);
close(fd);
return(0);
}
~

[stevebucknor1]

The below program is given for us in the class for practical........but i dint able to understand any single line........especially bolder and underlined texts. 1...normally in we'll use #include in c...where as in c++ ..#include....but what this new header files>>>? 2....what is syntax..stands for ??bolder text area's. It is really amazing and outstanding.