zuixin3.cpp

C语言课程设计

#include <stdlib.h>
#include <string.h>
#include <conio.h>       
#include <stdio.h>
#include <dos.h>
FILE *fp;
int i;  //i是全局变量  可代替length       
struct address            
{   char postnumber[10]; 
    char a[40];      //家庭地址
};
struct birthday      
{   int year;    
    int month;    
    int day;      
};
struct ffriend   
{   int num;       //序号
    char name[20];   
    char sex; 
    char telephone[13];            
    struct birthday birthday;   
    struct address address;     
     
}
friends[50];           
  
void CYLoad()
{   
    int j;
    long k;
    fp=fopen("friend.txt","a+");       //打开文件friend.txt   
    if(fp!=NULL)
    {  
        for(i=1;i<50;i++)

        {   
            j=fgetc(fp);
            if(j==EOF)               //判断是否到了文件尾
                return;
            k=i-1;
            fseek(fp,k*sizeof(struct ffriend),SEEK_SET);
            fread(&friends[i],sizeof(struct ffriend),1,fp);        //从文件中读取一条记录
        }

    }
    else
    {   
        fp=fopen("friend.txt","w");
        i=1;
    }
    
}
void CYXSH(int j)   
{
    //    friends[j].num=i;
    printf("\n\n\t编号-Nnumber:  %3d",friends[j].num);
    printf("\n\t姓名-Name:%-20s",friends[j].name);
    printf("\n\t性别-Sex:%c",friends[j].sex);
    printf("\n\t联系电话-Telephone:%-13s",friends[j].telephone);
    printf("\n\t出生日期-Birthday:%4d-%2d-%3d",friends[j].birthday.year,friends[j].birthday.month,friends[j].birthday.day);
    printf("\n\t邮编-Postnumber:%-10s",friends[j].address.postnumber);
    printf("\n\t通信地址-address:%-40s",friends[j].address.a);
}
void CYApp(int j)   
{
    fflush(stdin);           //区内清除文件缓冲区，文件以写方式打开时将缓冲容写入文件
                             //stdin是一个标准FILE*（文件型指针）指向通常是用键盘的输入的输入流
    friends[j].num=j;
    printf("\n\t\t\t编号-Number:%d",j);
    printf("\n\t\t\t姓名-Name:"); 
    scanf("%s",friends[j].name);
     fflush(stdin);                        //为什么没有fflush(stdin);  的效果会自动跳过呢?
    printf("\t\t\t性别-Sex(m/w):");      //为什么输入汉字男女也会自动跳过联系电话呢 
    scanf("%c",&friends[j].sex);
    printf("\t\t\t联系电话-telephone:");    
    scanf("%s",friends[j].telephone);
    printf("\t出生日期-birthday");  
    printf("\n\t\t\t年份-year:");
    scanf("%d",&friends[j].birthday.year);
    printf("\t\t\t月份-month:");
    scanf("%d",&friends[j].birthday.month);
    printf("\t\t\t日-day:");
    scanf("%d",&friends[j].birthday.day);
    printf("\t\t\t邮编-Postnumber:"); 
    scanf("%s",friends[j].address.postnumber);
    printf("\t\t\t通信地址-Address:");   
    scanf("%s",friends[j].address.a);
    getchar();
}
void CYDel()                 
{
    int k;
    printf("\n\tDelete 编号-Number:");   
    scanf("%d",&k);
    if(k<=i)
    {
        for(int j=k;j<i+1;j++)  /*插入位置后的元素顺序后移*/
        {
        strcpy(friends[j].name,friends[j+1].name); /*交换元素内容*/
        friends[j].sex=friends[j+1].sex;
        strcpy(friends[j].telephone,friends[j+1].telephone);
        friends[j].birthday.year=friends[j+1].birthday.year;
        friends[j].birthday.month=friends[j+1].birthday.month;
        friends[j].birthday.day=friends[j+1].birthday.day;
        strcpy(friends[j].address.postnumber,friends[j+1].address.postnumber);
        strcpy(friends[j].address.a,friends[j+1].address.a);
        
        }
        i--;     
    }
    else
    {
            printf("输入的编号太大!"); 
    }
}
void CYM(int j)    
{
    CYApp(j);
}
void CYSav()    
{
    int j;
    fp=fopen("friend.txt","w");
    for(j=1;j<=i;j++)
    {   
        fwrite(&friends[j],sizeof(struct ffriend),1,fp);
    }
    fclose(fp);

}

void main()
{
    int j;
    char grade;
    char searchname[10];
    CYLoad();
    i--;
    do
    {   
        printf("\t\t\t\4\4\4学生资料管理系统\4\4\4\n\n");
        printf("     \3\3\3功能选择(Function choose)\3\3\3                                   \n");
        printf("\n");
        printf("     \1 A. 读取(Read)                                    \1\1\1\1\1\1\1\1\1\1\n");
		printf("     \2 B. 增添(Append)                                   \2\2\2\2\2\2\2\2  \n");
        printf("     \6 C. 插入(Insert)                                    \6\6\6\6\6\6    \n");
        printf("     \5 D. 删除(Delete)                                     \5\5\5\5      \n");
        printf("     \5 E. 查询(Search)                                     \5\5\5\5      \n");
        printf("     \6 F. 修改(Modify)                                    \6\6\6\6\6\6    \n");
        printf("     \2 G. 保存(Save)                                     \2\2\2\2\2\2\2\2  \n");
        printf("     \1 H. 退出(Quit)                                    \1\1\1\1\1\1\1\1\1\1\n");
        printf("     请选择(Choice)                                         \n\t\t\t\t\t\t\t\6曹阳制作\6\n注:输入A~H的大写字母   \t\t\t\t\t06信安\2\1\3\5\n\n");
        scanf("%c",&grade);  
        switch(grade) 
            //加个大写和小写 都可以啊 
        {
        case 'A': j=1;     //显示功能                     
             while(getchar()!=0x1b&&j<=i)       //增添按Esc键退出 
             {     
                 CYXSH(j++);
                 printf("\n请按回车键继续!");
             }
             if(j-1<1)
             {
                 printf("\n\t空文档,无任何记录-Empty Note\n");
                 printf("\n请按回车键继续!");
                 getchar();
            
             }
             printf("\n\t\t\t\t\t\t\t此次操作结束");
             printf("\n\t------------------------------------------------------------\t\t\n");
             break;    
        case 'B':          //增加功能
              while(i<=50)                        //增加按ESC键退出的功能
              {
                  i++;
                  CYApp(i);
                  printf("\t是否继续增加?y/n");
                  //修改 加上else if 其他就跳出或强制打印出出错 
                  char a=getchar();
                  if(a=='n'||a=='N')
                      break;                       
              }
              if(i==51)
                  printf("\n\t文档已满,无法增加记录-note full");
             printf("\n\t\t\t\t\t\t\t此次操作结束");
             printf("\n\t------------------------------------------------------------\t\t\n");
             getchar();
             break;
        case 'C':
             int k;
              printf("\n\t输入要插入的位置:");     
              scanf("%d",&k);
             j=i+1;
                friends[j].num=j;
             for(j;j>k;j--)  //插入功能
             {
                strcpy(friends[j].name,friends[j-1].name); //数据后移
                friends[j].sex=friends[j-1].sex;
                strcpy(friends[j].telephone,friends[j-1].telephone);
                friends[j].birthday.year=friends[j-1].birthday.year;
                friends[j].birthday.month=friends[j-1].birthday.month;
                friends[j].birthday.day=friends[j-1].birthday.day;
                strcpy(friends[j].address.postnumber,friends[j-1].address.postnumber);
                strcpy(friends[j].address.a,friends[j-1].address.a);
                
             }
             CYApp(k);
             i++;  
             printf("\n\t\t\t\t\t\t\t此次操作结束");
             printf("\n\t------------------------------------------------------------\t\t\n");
             break;   
        case 'D':           //删除功能                  //增添随意删除多条记录的功能
             CYDel();
             if(i<1)
             printf("\n没有记录-No records\n");
             printf("\n请按回车键继续!");
              getchar();
             getchar();    
             printf("\n\t\t\t\t\t\t\t此次操作结束");
             printf("\n\t------------------------------------------------------------\t\t\n");
            break;
        case 'E':      //查询功能              
             printf("\n\t请输入要查询记录的相关姓名:");    //增添查询按列号的
                    scanf("%s",searchname);
             for(j=1;j<=i;j++)
             {
                if(strcmp(searchname,friends[j].name)==0)  //比较字符串
                {   
                    CYXSH(j); 
                     break;
                }
             }
             if(i<1)     
             {
                printf("\n 没有您所查询的记录-No records");
                printf("\n 请按回车键继续!");
                getchar();
             }
             printf("\n\t\t\t\t\t\t\t此次操作结束");
             printf("\n\t------------------------------------------------------------\t\t\n");
             getchar();
             break;
        case 'F':      //修改功能                       / /增添按序列号查询
             printf("\n\t请输入要修改记录的相关姓名:");
             gets(searchname);
             scanf("%s",searchname);
             for(j=1;j<=i;j++)
             {
                  if(strcmp(searchname,friends[j].name)==0)  //比较字符串
                  {  
                      CYM(j);  
                    //  getchar();                     //加个输出确定修改吗
                  }
              }
              if(i<1)      //修改功能
              {   printf("\n 没有您所要修改的记录-No records");
                  printf("\n 请按回车键继续!");
                  getchar();
                  getchar();
              }
              printf("\n\t\t\t\t\t\t\t此次操作结束");
              printf("\n\t------------------------------------------------------------\t\t\n");
              break;
          case 'G': 
              CYSav();     //存盘功能                     
              getchar();
              printf("\n\t\t\t\t\t\t\t此次操作结束");              
              printf("\n\t------------------------------------------------------------\t\t\n");
              break;
             
         case 'H':       //退出功能
              char x;
              printf("是否保存?yes/no\n");
              scanf("%s",&x);
                //getchar();
                //    getchar();
             if(x=='y')       
             {   
                 CYSav();
                 exit(0);
             }
             else
                 exit(0);
                   
             default: 
                  printf("\n\t输入有误,请输入正确的编号!");
                  printf("\n请按回车键继续!");
                  getchar();
                  printf("\n\t\t\t\t\t\t\t此次操作结束");
             printf("\n\t------------------------------------------------------------\t\t\n");
        }
    }while(1);
}