C语言大作业——学生通讯录管理系统#include#include//#define NULL 0#define LEN sizeof(struct message)struct message //定义结构体{char name[15];char number[15];char phone[15];char qq[13];char addr[25];struct message *next; //指向下一数据};int n;void creat() //建立电话簿{int num;char choice[5]={'2'};FILE *fp;struct message *head;struct message *p,*q;n = 0;p = q = (struct message *) malloc(LEN);fp=fopen("通讯录1.txt","wb");system("cls");printf("\n请输入姓名:");scanf("%s",p->name);printf("\n请输入电话号码:");scanf("%s",p->phone);printf("\n请输入学号:");scanf("%s",p->number);printf("\n请输入QQ:");scanf("%s",p->qq);printf("\n请输入住址:");scanf("%s",p->addr);fwrite(p,LEN,1,fp);fclose(fp);head = 0;num = 1;while(num!=0){n = n+1;if(n==1) head = p;else q->next = p;q = p;p = (struct message *) malloc(LEN); //分配存储区while(choice[0]!='1' && choice[0]!='0') //判断是否继续{printf("\n1 继续输入\n 0 返回\n");printf("请选择操作：");scanf("%s",choice);}switch(choice[0]){case '1':{fp=fopen("通讯录1.txt","rb");system("cls");printf("\n请输入姓名:");scanf("%s",p->name);printf("\n请输入电话号码:");scanf("%s",p->phone);printf("\n请输入学号:");scanf("%s",p->number);printf("\n请输入QQ:");scanf("%s",p->qq);printf("\n请输入住址:");scanf("%s",p->addr);fwrite(p,LEN,1,fp);fclose(fp);choice[0] = '2';} continue;case '0': num = 0;system("cls");}}q->next = 0;}void add() //添加通讯录{int num;char choice[5]={'2'};FILE *fp;struct message *head;struct message *p,*q;n = 0;p = q = (struct message *) malloc(LEN); //分配空间fp=fopen("通讯录1.txt","ab");system("cls");printf("\n请输入姓名:"); //输入内容scanf("%s",p->name);printf("\n请输入电话号码:");scanf("%s",p->phone);printf("\n请输入学号:");scanf("%s",p->number);printf("\n请输入QQ:");scanf("%s",p->qq);printf("\n请输入住址:");scanf("%s",p->addr);fwrite(p,LEN,1,fp);fclose(fp);head = 0;num = 1;while(num!=0){n = n+1;if(n==1) head = p;else q->next = p;q = p;p = (struct message *) malloc(LEN); //分配空间while(choice[0]!='1' && choice[0]!='0') //判断是否继续{printf("\n1 继续输入\n 0 返回\n");printf("请选择操作：");scanf("%s",choice);}switch(choice[0]){case '1':{fp=fopen("通讯录1.txt","rb");system("cls");printf("\n请输入姓名:");scanf("%s",p->name);printf("\n请输入电话号码:");scanf("%s",p->phone);printf("\n请输入学号:");scanf("%s",p->number);printf("\n请输入QQ:");scanf("%s",p->qq);printf("\n请输入住址:");scanf("%s",p->addr);fwrite(p,LEN,1,fp);fclose(fp);choice[0] = '2';} continue;case '0': num = 0;system("cls");}}q->next = 0;}void findname(struct message * fphead) //按姓名查找{ struct message *p;int a = 0;char findname[20];system("cls");printf("请输入要查找的姓名：\n");scanf("%s",findname);for(p=fphead->next;p!=NULL;p=p->next){if(strcmp(p->name,findname)==0){printf("姓名电话号码学号QQ 住址\n");printf("%-15s %-15s %-15s %-13s %-25s\n",p->name,p->phone,p->number,p->qq,p->addr);a = 1;}}if(a != 1)printf("无此通讯录！\n");}void findphone(struct message * fphead) //按电话查找{struct message *p;int a = 0;char findphone[15];system("cls");printf("请输入要查找的电话：\n");scanf("%s",findphone);for(p=fphead->next;p!=NULL;p=p->next){if(strcmp(p->phone,findphone)==0){printf("姓名电话号码学号QQ 住址\n");printf("%-15s %-15s %-15s %-13s %-25s\n",p->name,p->phone,p->number,p->qq,p->addr);a = 1;}}if(a != 1)printf("无此通讯录！\n");}void findnumber(struct message * fphead) //按学号查找{struct message *p;int a = 0;char findnumber[15];system("cls");printf("请键入要查找的学生学号：\n");scanf("%s",findnumber);for(p=fphead->next;p!=NULL;p=p->next){if(strcmp(p->number,findnumber)==0){printf("姓名电话号码学号QQ 住址\n");printf("%-15s %-15s %-15s %-13s %-25s\n",p->name,p->phone,p->number,p->qq,p->addr);a = 1;}}if(a != 1)printf("无此通讯录！\n");}void modify(struct message * fphead) //修改记录{FILE *fp;struct message *p,*q;int a = 0;char findname[15];system("cls");printf("请键入要查找的姓名：\n");scanf("%s",findname);for(p=fphead->next;p!=NULL;p=p->next){if(strcmp(p->name,findname)==0){printf("姓名电话号码学号QQ 住址\n");printf("%-15s %-15s %-15s %-13s %-25s\n\n\n\n",p->name,p->phone,p->number,p->qq,p->addr);printf("\n请键入新姓名:");scanf("%s",p->name);printf("\n请键入新电话号码:");scanf("%s",p->phone);printf("\n请键入新学号:");scanf("%s",p->number);printf("\n请键入新QQ:");scanf("%s",p->qq);printf("\n请键入新住址:");scanf("%s",p->addr);fp = fopen("通讯录2.txt","wb");q = fphead->next; //P为链表头指针while(q!=0){fwrite(q,LEN,1,fp);if(q->next!=0)q = q->next;elseq = 0;}fclose(fp);unlink("通讯录1.txt"); //用新文件覆盖原文件rename("通讯录2.txt", "通讯录1.txt");printf("修改成功！");a = 1;}}if(a != 1)printf("无此通讯录！\n");}void del(struct message * fphead) //删除记录{FILE *fp,*fq;struct message *p,*q,*r;char sname[15];p = q = (struct message *) malloc(LEN);p = fphead;system("cls");fp = fopen("通讯录1.txt","rb");fq = fopen("通讯录2.txt","wb");printf("请输入欲删除记录的姓名：");scanf("%s",sname);while(strcmp(p->name,sname)!=0 && p->next!=0) //查找节点并删除该节点q = p;p = p->next;}if(strcmp(p->name,sname)==0){if(p==fphead)fphead = p->next;else{q->next = p->next;}r = fphead->next; //r为链表头指针while(r!=0){fwrite(r,LEN,1,fq);if(r->next!=0)r = r->next;elser = 0;}printf("删除成功！");}else{printf("无此通讯录！");}fclose(fp);fclose(fq);unlink("通讯录1.txt"); //用新文件覆盖原文件rename("通讯录2.txt", "通讯录1.txt");}struct message * open(void) //打开文件，载入链表{FILE *fp;struct message *p=NULL,*q=NULL,*temp=NULL,*fphead=NULL;fp=fopen("通讯录1.txt","rb");fphead=(struct message *)malloc(LEN); //分配空间temp = q = fphead;while(! feof(fp)) //循环读取，载入链表p=(struct message *)malloc(LEN);temp=q;q->next=p;q=p;fread(p,LEN,1,fp);}temp->next=NULL;fclose(fp);return(fphead); //返回链表头指针}void print() //显示通讯录{struct message *p;FILE *fp;system("cls");if((fp=fopen("通讯录1.txt","rb"))!=NULL){printf("姓名电话号码学号QQ 住址\n");p = (struct message *)malloc(LEN); //分配空间while(!feof(fp)){fread(p,LEN,1,fp);printf("%-15s %-15s %-15s %-13s %-25s\n",p->name,p->phone,p->number,p->qq,p->addr);}fclose(fp);else{printf("未建立通讯录!");}}void main() //主函数{FILE * fp;struct message * fphead;int begin = 1,f;char choice[5];while(begin == 1){printf("\t\t>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>\n");printf("\t\t\t\t欢迎使用学生通讯录\n");printf("\t\t<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< <<<<<<<<<<<<<<<<<<<<\n\n\n");printf("\t\t\t*主窗口菜单*\n\n");printf("\t\t\t1:显示通讯录中所有记录；\n\n");printf("\t\t\t2:建立新通讯录；\n\n");printf("\t\t\t3:添加新记录；\n\n");printf("\t\t\t4:查询通讯录中的记录；\n\n");printf("\t\t\t5:修改通讯录中的记录；\n\n");printf("\t\t\t6:删除通讯录中的记录；\n\n");printf("\t\t\t0:退出通讯录\n\n");printf("请选择操作：");scanf("%s",choice);switch(choice[0])case '1':{print();printf("按任意键返回主菜单！\n");getch();system("cls");} continue;case '2':{creat();} continue;case '3':{add();} continue;case '4':{if((fp = fopen("通讯录1.txt","rb")) != NULL){fclose(fp);system("cls");printf("1按姓名查询;\n2按电话查询;\n3按学号查询;\n"); printf("请输入查询方式:");scanf("%d",&f);if(f==1){fphead = open();findname(fphead);}if(f==2){fphead = open();findphone(fphead);}else if(f==3){fphead = open();findnumber(fphead);}}else{system("cls");printf("未建立通讯录！");}printf("按任意键返回主菜单！\n");getch();system("cls");} continue;case '5':{if((fp = fopen("通讯录1.txt","rb")) != NULL) {fclose(fp);fphead = open();modify(fphead);}else{printf("未建立通讯录！");}printf("按任意键返回主菜单！\n");getch();system("cls");}continue;case '6':{if((fp = fopen("通讯录1.txt","rb")) != NULL) {fclose(fp);fphead = open();del(fphead);}else{system("cls");printf("未建立通讯录！");}printf("按任意键返回主菜单！\n");getch();system("cls");} continue;case '0': exit(0);default:{system("cls");printf("输入错误，按任意键返回主菜单！\n"); getch();}}}system("pause"); }。
