Linux & C:- Open a file for read and write from Command Line Arguments

#include<stdio.h>
#include<sys/types.h>
#include<fcntl.h>

int main(int argc,char * argv[])
{

int fd=open(argv[1],O_RDONLY);
char buff[20];
read(fd,buff,10);
close(fd);

int gd=open(argv[2],O_WRONLY);
write(gd,buff,10);
close(gd);
return 0;
}