lt71.c

programs in <C program design>

# include "stdio.h"
 # define N 30
 struct student_type
 { char name[8];
 int num;
 int age;
 float score;
 } stud[N];
 void save()
 { FILE *fp;
 int i;
  if ((fp=fopen("st_score","wb"))==NULL)
   { printf("cannot open file\n");
    return;
    }
    for (i=0;i<N;i++)
      if (fwrite(&stud[i],sizeof(struct student_type),1,fp)!=1)
        printf("file write error\n");
        }
    void main( )
    { int i;
      for (i=0;i<N;i++)
       scanf("%s%d%d%s",stud[i].name,&stud[i].num,&stud[i].age,stud[i].score);
       save( );
       }