申请该结构体数组，容量为5，初始化5个学生的信息 使用fprintf将数组中的5个学生信息，保存到文件中去 下一次程序运行的时候，使用fscanf，将文件中的5个学生信息，写入(加载)到数组中去，并直接输出学生信息

  1 #include <stdio.h>
  2 #include <string.h>
  3 #include <unistd.h>
  4 #include <stdlib.h>
  5 #include <sys/types.h>
  6 #include <sys/stat.h>
  7 #include <fcntl.h>
  8 #include <pthread.h>
  9 #include <semaphore.h>
 10 #include <wait.h>
 11 #include <signal.h>
 12 #include <sys/socket.h>
 13 #include <arpa/inet.h>
 14 #include <sys/socket.h>
 15 #include <sys/ipc.h>
 16 #include <sys/sem.h>
 17 #include <semaphore.h>
 18 #include <sys/msg.h>
 19 #include <sys/shm.h>
 20 #include <sys/un.h>
 21 typedef struct Student
 22 {
 23     char name[16];
 24     int age;
 25     double matg_score;
 26     double chinese_score;
 27     double english_score;
 28     double physics_score;
 29     double chemistry_score;
 30     double bio_score;
 31 }Student,*node_p;
 32 int main(int argc, const char *argv[])
 33 {
 34     node_p H=(node_p)malloc(sizeof(Student)*5);
 35     if(H==NULL)
 36     {
 37         printf("空间申请失败\n");
 38         return -1;
 39     }
 40     strcpy((H)->name,"zhangshan");
 41     (H+0)->age=20;(H+0)->matg_score=88.01;(H+0)->chinese_score=99.02;(H+0)->english_score=93.05;(H+0)->physics_score=94.04;(H+0)->chemistry_score=96.06;(H+0)->bio_score=99.99;
 42     strcpy((H+1)->name,"lisi");
 43     (H+1)->age=21;(H+1)->matg_score=88.11;(H+1)->chinese_score=99.12;(H+1)->english_score=93.15;(H+1)->physics_score=94.14;(H+1)->chemistry_score=96.16;(H+1)->bio_score=99.99;
 44     strcpy((H+2)->name,"wangwu");
 45     (H+2)->age=22;(H+2)->matg_score=88.21;(H+2)->chinese_score=99.22;(H+2)->english_score=93.25;(H+2)->physics_score=94.24;(H+2)->chemistry_score=96.26;(H+2)->bio_score=99.99;
 46     strcpy((H+3)->name,"lingliu");
 47     (H+3)->age=23;(H+3)->matg_score=88.31;(H+3)->chinese_score=99.32;(H+3)->english_score=93.35;(H+3)->physics_score=94.34;(H+3)->chemistry_score=96.36;(H+3)->bio_score=99.99;
 48     strcpy((H+4)->name,"xiaoqi");
 49     (H+4)->age=24;(H+4)->matg_score=88.41;(H+4)->chinese_score=99.42;(H+4)->english_score=93.45;(H+4)->physics_score=94.44;(H+4)->chemistry_score=96.46;(H+4)->bio_score=99.99;
 50     FILE *fp=fopen("./06_tset.c","w");
 51     if(fp==NULL)                                                                                                                                                                                                                                                                                                                 
 52     {
 53         perror("fopen");
 54         return 1;
 55     }
 56     for(int i=0;i<5;i++)
 57     {
 58         fprintf(fp,"name=%s\t age=%d\t matg_score=%.2lf\t chinese_score=%.2lf\t english_score=%.2lf\t physics_score=%.2lf\t chemistry_score=%.2lf\t bio_score=%.2lf\n",(H+i)->name,(H+i)->age,(H+i)->matg_score,(H+i)->chinese_score,(H+i)->english_score,(H+i)->physics_score,(H+i)->chemistry_score,(H+i)->bio_score);
 59     }
 60     fclose(fp);
 61     fp=fopen("./06_tset.c","r");
 62     if(fp==NULL)
 63     {
 64         perror("报错信息");
 65         return 1;
 66     }
 67     char arr[10000];
 68     int i=0;
 69     while(1)
 70     {
 71         int retval=fscanf(fp,"%c",&arr[i]);
 72             if(retval==EOF)
 73             {
 74                 break;
 75             }
 76             i++;
 77     }
 78     for(int j=0;j<i;j++)
 79     {
 80         printf("%c",arr[j]);
 81     }
 82     fclose(fp);
 83     free(H);
 84     H=NULL;
 85     return 0;
 86 }