13-3c.cpp

来自「有关c语言的说课的课件,内容丰富多彩,值得借鉴」· C++ 代码 · 共 39 行

#include <stdio.h>
      #define SIZE 10
      struct student_type
       {char name[10];
         int num;
         int age;
         char addr[15];
        }stud[SIZE];        
void load( )
     {FILE *fp;
         int i;
         if((fp=fopen("stu-dat","rb"))==NULL)
           {printf("cannot open infile\n");
             return;}
         for(i=0;i<SIZE;i++)
            if(fread(&stud[i],sizeof(struct student_type),1,fp)!=1)
              {if(feof(fp)) {fclose(fp); return;}
                printf("file read error\n");
               }
fclose (fp);
          } 
void save( )
	 {FILE *fp;
           int i;
	   if((fp=fopen("stu-a","wb"))==NULL)
              {printf("cannot open file\n");
                return;
               }
	   for(i=0;i<SIZE;i++)
	       if(fwrite(&stud[i],sizeof(struct student_type),1,fp)!=1)
                   printf("file write error\n");
fclose(fp);
	  }   
  main()
   {
     load( );
     save( );
      }