我做个从D：盘上读取N行数据到数组a[]中;我写了个，你们看看，那不行呀谁
#include "Stdio.h"
#include "Conio.h"

int main(void)
{              int n=1,a[300],i;
  float m=-1;
  FILE *fp,*fp1;
  char filename[2][30];
   scanf("%s",filename[1]);
     if((fp1=fopen(filename[1],"r"))==NULL)
     {for(i=1;i<300;i++)
     fscanf(fp1,"%d",&a[i]);
     }
     for(i=1;i<300;i++)
     printf("%d\n",a[i]);
 /* 此处添加你自己的代码 */
  getch();
  return 0;
}

#include<stdio.h>
#include<conio.h>
void main()
{
    FILE *p;
    int i;
    char a[50],b[50];
    if(!(p=fopen("d:\\cccccc.txt","r+")))   
     {
         printf("打开失败le");
           exit(1);
     }
     while(!feof(p))
     {    for(i=0;i<5;i++)
          { fread(a,sizeof(char),10,p);
            puts(a);
            printf("\n");
          }
      }
      fclose(p);
      if(!(p=fopen("d:\\asd.txt","w")))
      {
          printf("打开失败");
          exit(1);
      }
 
      fwrite(b,sizeof(char),100,p);
      fclose(p);
      putchar(2);
      puts(b);
      getch();
}



     if((fp1=fopen(filename[1],"r"))==NULL)    //这里fp1前加个！你这是当打开失败时执行for循环！！显然错误。