C语言完美演绎9-24

/* 范例：9-24 */

#include <fcntl.h>

#include <io.h>

#include <stdio.h>

#include <stdlib.h>

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

{

int file1,file2;

char buf[512];

if((file1 = open(argv[1],O_RDONLY))==-1)

{

printf("Read file %s Error!\n",argv[1]);

exit(1);

}

if((file2 = open(argv[2], O_WRONLY|O_CREAT))==-1)

{

printf("Create file %s Error!\n",argv[2]);

exit(1);

}

while(read(file1,buf,512)>0)

write(file2,buf,512);

close(file1);

close(file2);

}

程序执行结果：

D:\TC>p9-24 xx.txt out.txt