13_9.cpp

C程序参考,简单易懂,是初学者不可少的参考资料

#include<stdio.h>
#include<process.h>
#include<conio.h>
#define SIZE 2
typedef struct
{
  char   name[31];
  int    no;
  int    age;
  char   addr[31];
}  Student;
Student  student_list1[SIZE], student_list2[SIZE];
void main()
{
  FILE *fp;
  int i;
  if((fp=fopen("d:\\student_list.dat","wb+"))==NULL)      
  {
    printf("Cannot open file strike any key exit!");
    getch();
    exit(1);
  }
  printf("\ninput data(name, no, age, address)\n");
  for(i=0; i<SIZE; i++){                                    
    scanf("%s%d%d%s", &student_list1[i].name, &student_list1[i].no, 
                      &student_list1[i].age, &student_list1[i].addr);  
  }
  if(SIZE != fwrite(student_list1, sizeof(Student), SIZE, fp) )  
  {
	    printf("write error!");
	    exit(1);         
  }
  rewind(fp);
  if(SIZE != fread(student_list2, sizeof(Student), SIZE, fp) )  
  {
printf("read error!");
	    exit(1);               
  }
  printf("\n\nname                           number  age address\n");
  printf(    "______________________________ ______ ___ ______________________________\n");
  for(i=0;i<SIZE;i++)
  {
    printf("%-30s %-6d %-3d %-30s\n",student_list2[i].name,student_list2[i].no,           /*打印*/
                                 student_list2[i].age, student_list2[i].addr); 
  }
  fclose(fp);
  exit(0);
}