数据库——文件复制

#include 

int main()
{
    FILE *fp;
    FILE *from;
    char ch;
    char p[20]="hello";

    fp = fopen("test.c","r+");
    from =fopen("copy2.c","w+");

    if((fp=fopen("test.c","r"))==NULL)
    {
	printf("Cannot open test.c strike any key exit!n");
	exit(1);
    }
    else
    {
	fwrite(p,1,5,fp);
    }

    if((from=fopen("copy2.c","w+"))==NULL)
    {
	printf("Cannot open copy2.c strike any key exit!n");
	exit(1);
    }
    else
    {
	fseek(fp,0,SEEK_SET);
    	ch=fgetc(fp);
       
	 while(ch!=EOF)
        {
	    fputc(ch,from);
	    ch=fgetc(fp);
        }
    }

        printf("n");

    fclose(from);
    fclose(fp);
	
    return 0;
}