标准字符cp功能

#include<stdio.h>
#include<fcntl.h>

int main(int argc,char *argv[])
{
    FILE *src_fp,*des_fp;
    int src_ret;

    if(argc<3)
    {
        printf("please input parameter");
        return -1;
    }

    //打开源文件
    src_fp = fopen(argv[1],"r");
    if(src_fp == NULL)
    {
        printf("open the file %s is failure\n",argv[1]);
        return -2;
    }
    printf("open the file %s is success\n",argv[1]);

    //打开目的文件
    des_fp = fopen(argv[2],"w");
    if(des_fp == NULL)
    {
        printf("open the file %s is failure\n",argv[2]);
        return -3;
    }
    printf("open the file %s is success\n",argv[2]);

    //将源文件拷到目的文件中
    while(1)
    {
        src_ret = fgetc(src_fp);
        if(feof(src_fp))
        {
            printf("the file is end\n");
            break;
        }
        fputc(src_ret,des_fp);
    }

    //关闭文件流
    fclose(src_fp);
    fclose(des_fp);
    return 0;
}