这个程序主要实现文件复制，我将文件路径通过赋值的方式传递给子函数。附件为文件路径。结果运行时：提示两个文件都打不开；
#include<stdio.h>
#include<stdlib.h>
void thirteen_one(void);
void thirteen_two(int argc,char *argv[]);
void main(void)
{
    int argc = 3;
    char *argv[3];
    argv[0] = "thirteen.exe";
    argv[1] = "d:\file\thirteen";
    argv[2] = "d:\file\thirteen_two";
    thirteen_two(argc,argv);
}

/*13.2*/
void thirteen_two(int argc,char *argv[])
{
    FILE *fp_in;
    FILE *fp_out;
    char ch;
    if(argc != 3)
    {
        printf("Usage file %s sourcefile targetfile\n",argv[0]);
        exit(1);
    }
    if((fp_out=fopen(argv[2],"w")) == NULL)
    {
        printf("could not open file %s\n",argv[2]);
        exit(1);
    }
    if((fp_in=fopen(argv[1],"r")) == NULL)
    {
        printf("could not open file %s\n",argv[1]);
        exit(1);
    }
    while((ch=getc(fp_in)) !=EOF)
    {
        fputc(ch,fp_out);
    }
    if(fclose(fp_in) !=0)
        printf("cannot close file %s\n",argv[1]);
    if(fclose(fp_out) !=0)
        printf("cannot close file %s\n",argv[2]);
}

简单说说：
看这里：
    argv[1] = "d:\file\thirteen";
    argv[2] = "d:\file\thirteen_two";
改为
    argv[1] = "d:\\file\\thirteen";
    argv[2] = "d:\\file\\thirteen_two";

我试了  可以了  谢了啊  兄弟！！！