How to move files using C language

How to use c language to implement mv command like linux mv

Principle:
Open two files, read the contents of the first file, write to the second file, and finally delete the first file:

#include<sys/types.h>
#include<sys/stat.h>
#include<stdio.h>
#include<fcntl.h>
main( int argc,char *argv[] )
{
	int i,fd1,fd2;
	char *file1,*file2,buf[2];
	file1=argv[1];
	file2=argv[2];
	printf("file1=%s file2=%s",file1,file2);
	fd1=open(file1,O_RDONLY,0777);
	fd2=creat(file2,0777);
	while(i=read(fd1,buf,1)>0)
		write(fd2,buf,1);
	remove(file1); // 
	close(fd1);
	close(fd2);
}