lt75.c

programs in <C program design>

# include "stdio.h"
 # include "stdlib.h"
  void main()
 {FILE *fp;
 char string[41];
  if ((fp=fopen("writ.dat","r"))==NULL)
   { printf("不能打开该文件\n");
     exit(0);
   }
 while (fgets(string,40,fp)!=NULL)
  printf("%s",string);  /* 输出文件中的每行字符 */
 fclose(fp);
 }