1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #define max 3 5  6 typedef struct student{ 7    char name[10];  //最好用数组，方便，用指针到时写入到文本不好操作 8    int age; 9    int score;10 }STU;11 int size = sizeof(STU);12 void write(STU *);13 void input(STU *); 14 void output(STU *);15 //void clean(STU *); 16 17 void main(void)18 {19   STU kang[max];20   input(kang);21   output(kang);22   write(kang); 23   clean(kang);24 }25 26 void input(STU * student)27 {28    char temp[10];29    int i=0;30    while(i<max && fgets(temp,sizeof(temp),stdin)!=NULL && temp[0]!=‘\0‘  )31    {32       //student->name = (char *) malloc(strlen(temp)+1);  33       strcpy(student->name,temp);34       puts("age ?"); 35       scanf("%d",&student->age);36       puts("score ?");37       scanf("%d",&student->score);38       39       while(getchar() != ‘\n‘)40          continue;41   42       student++;43       i++;44       if(i<max)45         puts("next name");46    }47 48 }49 50 void output(STU * student)51 {52    int i=0;53    while(i<max)54    {55       printf("%d---%s---%d---%d\n",i,student->name,student->age,student->score);56       i++;57       student++;58    }59 60 }61 62 void write(STU * student)63 {64     FILE *fp;65     int i=0;66     if( (fp=fopen("data.txt","w+b")) == NULL )67     {68       puts("open error");69     }70    71     while(i<max)72     {73        fwrite(student,size,1,fp);74        i++;student++;75     }76  77    fclose(fp);78 79 }80 81 void clean(STU * student)82 {83   int i=0;84   while(i<max)85   {86     free(student->name);87     i++;88     student++;89   }90 }

 1 #include <stdio.h> 2 #include <stdlib.h> 3 #define max 3 4  5 typedef struct student{ 6    char name[10]; 7    int age; 8    int score; 9 }STU;10 int size = sizeof(STU);11 void read(STU *);12 13 void main(void)14 {15    STU kang[max];16    read(kang); 17    18    int i=0;19    while(i<max)20    {21      printf("%s---%d---%d\n",kang[i].name,kang[i].age,kang[i].score);22      i++;23    }   24 25 }26 27 28 void read(STU * student)29 {30     FILE *fp;31     int i=0;32     if( (fp=fopen("data.txt","a+b")) == NULL )33     {34       puts("open error");35       exit(1);36     }37     rewind(fp);38    while(i<max)39    {  40      fread(student,size,1,fp);41      student++;i++;42    }   43  44    fclose(fp);45 46 }