[简答题]C盘中P1.c.txt文件的内容为：abcde。D盘中P1.c.txt为空文档。#include<stdio.h>#include<stdlib.h>main(){ FILE *f1,*f2;  int k;  if((f1=fopen("C:\\P1.c.txt","r"))==NULL)  { printf("can not open file!\n");    exit(0);   }  if((f2=fopen("D:\\P1.c.txt","w"))==NULL)   { printf("can not open file!\n");

   exit(0);

   }  for(k=1;k<500;k++)  { if(feof(f1))  break;    fputc(fgetc(f1),f2);   }  printf("成功实现复制")  fclose(f1);  fclose(f2);}