APP管理系统

/
/
           APP管理系统           
                                 
        学号:xxxxxxxxxxx         
           姓名:xxxxxx           
                        2020年8月
/
/#include 
#include
#include
#include#define USER "1234"
#define PASSWORD "1234"struct  APP{int no;//编号char name[20];//名称 char version[20];//版本char time[20];//发布时间
};struct List
{struct APP data;struct List* next;
};//单链表结构体struct List* load();//加载文件函数的声明
void print(struct List* head);//打印链表 
void save(struct List* head);//保存文件
struct List* add(struct List* head);//新增
void init(); 
int menu();
void search(struct List* head);//查询
void change(struct List* head);//修改
struct List* del(struct List* head);//删除
void sort(struct List* head);//排序int main()
{int choice;struct List* head;init(); head=load();do{choice=menu();switch(choice){case 1:head=add(head);case 2:print(head);break;case 3:search(head);break;case 4:change(head);break; case 5:head=del(head);break;case 6:sort(head);print(head);break;	}}while(choice!=0);save(head);return 0;
}int menu()
{int choice;system("cls");printf("\n\n\n\n\n\n\n");printf("                         ********** 欢迎光临 **********\n\n");printf("         ************************ APP管理系统 ************************\n\n\n");printf("\n\n"); printf("                      ***********************************\n"); printf("                      *1:新增APP信息       2:显示APP信息*\n");printf("                      *3:查询APP信息       4:修改APP信息*\n");printf("                      *5:删除APP信息       6:排序APP信息*\n"); printf("                      *0:退出                           *\n");printf("                      ***********************************\n"); printf("                      请输入选择:");scanf("%d",&choice);return choice;
}void search(struct List* head)
{int no;struct List* p=head;printf("请输入要查询的APP编号:");scanf("%d",&no);while(p){if(p->data.no==no){printf("%d %s %s %s\n",p->data.no,p->data.name,p->data.version,p->data.time);break;}p=p->next;}if(p==NULL){printf("无该APP信息!\n");}system("pause");
}
void change(struct List* head)
{struct APP t;struct List* p=head;system("cls");printf("请输入要修改的APP编号:");scanf("%d",&t.no);while(p){if(p->data.no==t.no){printf("%d %s %s %s\n",p->data.no,p->data.name,p->data.version,p->data.time);break;}p=p->next;}if(p==NULL){printf("无该APP信息!\n");}else{printf("请修改APP名称:");scanf("%s",t.name);printf("请修改APP版本:");scanf("%s",t.version);printf("请修改APP发布时间:");scanf("%s",t.time);p->data=t;printf("修改成功!\n");}
}
struct List* del(struct List* head)
{int no;struct List* p=head,*q;printf("请输入要删除的APP编号:");scanf("%d",&no);while(p){if(p->data.no==no){printf("%d %s %s %s\n",p->data.no,p->data.name,p->data.version,p->data.time);break;}q=p;p=p->next;}if(p==NULL){printf("无该APP信息!\n");}else{if(p==head){head=head->next;}else{q->next=p->next;}free(p);printf("删除成功!\n");}return head;
}
void sort(struct List* head)
{struct List* i,*j;struct  APP temp;for(i=head;i!=NULL;i=i->next){for(j=i->next;j!=NULL;j=j->next){if(i->data.no>j->data.no){temp=i->data;i->data=j->data;j->data=temp;}}}
}void init()
{int n,y=1,i=0;char a,d,b[10];char code[100];struct hotelinfo *head=NULL;while(y){	system("cls");printf("\n\n\n\n\n\n\n");printf("                         ********** 欢迎光临 **********\n\n");printf("         ************************ APP管理系统 ************************\n\n\n");printf("\n\n"); printf("                      ***********************************\n"); printf("                      ************1-用户登录***********\n");printf("                      ************0-退出系统***********\n");printf("                      ***********************************"); printf("\n");printf("       请输入您的选择:");scanf("%d",&n);printf("\n");getchar();switch(n){case 0:exit(0);break;case 1:printf("       请输入您的用户名(1234):");gets(b);printf("\n");	printf("       请输入您的密码(1234):");//scanf("%d",&c);/*********/while((a=getch())!='\r'){if(a=='\b'){if(i>0){printf("\b \b");i--;}}else{code[i++]=a;printf("*");}}code[i]='\0';/*********/printf("\n");if(strcmp(b,USER)!=0||strcmp(code,PASSWORD)!=0){printf("           验证失败,请重新输入!\n");scanf("%c",&d);getchar();system("cls");} else{return;}break;default:printf("        您的输入有误!  请重新输入!\n");printf("        按任意键继续!\n");getchar();break;} }
}	 
struct List* add(struct List* head)
{struct  APP newapp;struct List* p;printf("请输入APP编号:");scanf("%d",&newapp.no);printf("请输入APP名称:");scanf("%s",newapp.name);printf("请输入APP版本:");scanf("%s",newapp.version);printf("请输入APP发布时间:");scanf("%s",newapp.time);p=(struct List*)malloc(sizeof(struct List));p->data=newapp;p->next=head;return p;
}void save(struct List* head)
{struct List *p=head;FILE* fp=fopen("f1.txt","w");if(fp==NULL){printf("写入文件时，文件无法打开！");exit(0);}while(p){fprintf(fp,"%d %s %s %s\n",p->data.no,p->data.name,p->data.version,p->data.time);p=p->next;}fclose(fp);
}struct List* load() 
{FILE* fp;struct List *head,*tail,*p1;head=tail=NULL;if((fp=fopen("f1.txt","r"))==NULL){printf("不存在此文件，无法打开！");fp=fopen("f1.txt","w");fclose(fp);exit(0);}if(fgetc(fp)!=EOF){fp=fopen("f1.txt","r");while(!feof(fp)){p1=(struct List*)malloc(sizeof(struct List));fscanf(fp,"%d %s %s %s\n",&p1->data.no,p1->data.name,p1->data.version,p1->data.time);if(head==NULL){head=p1;tail=head;}else{tail->next=p1;}tail=p1;}tail->next=NULL;fclose(fp);} return head;}void print(struct List* head)
{ struct List* temp=head;while(temp!=NULL){printf("%d %s %s %s\n",temp->data.no,temp->data.name,temp->data.version,temp->data.time);temp=temp->next;}system("pause");
} 

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