标准块CP功能实现

#include<stdio.h>
 
int main(int argc,char *argv[])
{
    FILE *src_fp,*des_fp;
    int src_ret;
    char buf[]={};
 
    if(argc != )
    {
        printf("please input paramester\n");
        return -;
    }
 
    //打开源文件
    src_fp = fopen(argv[],"r");
    if(src_fp == NULL)
    {
        printf("open the file %s is failure\n",argv[]);
        return -;
    }
    printf("open the file %s is success\n",argv[]);
 
    //打开目的文件
    des_fp = fopen(argv[],"w");
    if(des_fp == NULL)
    {
        printf("open the file %s is failure\n",argv[]);
        return -;
    }
    printf("open the File %s is success\n",argv[]);
 
    //将源文件拷到目的文件中
    while()
    {
        src_ret = fread(buf,,,src_fp);
        if(src_ret == )
        {
            printf("the file is end\n");
            break;
        }
        fwrite(buf,,src_ret,des_fp);
    }
 
    //关闭文件流
    fclose(src_fp);
    fclose(des_fp);
    return ;
}