C語言實現了通訊錄的錄入信息、保存信息、插入、刪除、排序、查找、單個顯示等功能。。
完整的代碼如下：
#include <stdio.h> #include <malloc.h> //得到指向大小為Size的內存區域的首字節的指針// #include <string.h> #include <stdlib.h> //標準庫函數// #define NULL 0 #define LEN sizeof(struct address_list) //計算字節// int n; struct address_list { char name[30]; //名字 char work[30]; //職業 char handset[30]; //手機 char email[30]; //電子郵件 char address[30]; //通訊地址 struct address_list *next; }; struct address_list *shifang(struct address_list *head); // 釋放內存函數聲明 //創建函數，不帶頭結點的鏈表 struct address_list *creat(void) { struct address_list *head,*p1,*p2; char name[20]; n=0; p1=(struct address_list *)malloc(LEN); p2=p1; //強制內存轉換 printf("請輸入通訊錄的內容!/n姓名輸入為0時表示創建完畢!/n"); printf("請輸入姓名:"); gets(name); if(strcmp(name,"0")!=0) { strcpy(p1->name,name); printf("請輸入職業:"); gets(p1->work); printf("請輸入手機:"); gets(p1->handset); printf("請輸入電子郵件:"); gets(p1->email); printf("請輸入通訊地址:"); gets(p1->address); head=NULL; while(1) { n=n+1; //記錄通訊錄人數個數 if(n==1) head=p1; else p2->next=p1; p2=p1; printf("請輸入姓名:"); gets(name); if(strcmp(name,"0")==0) { break; } else { p1=(struct address_list *)malloc(LEN); strcpy(p1->name,name); printf("請輸入職業:"); gets(p1->work); printf("請輸入手機:"); gets(p1->handset); printf("請輸入電子郵件:"); gets(p1->email); printf("請輸入通訊地址:"); gets(p1->address); } } p2->next=NULL; return head; } else return 0; } //輸出函數 void print(struct address_list *head) { struct address_list *p; if(head!=NULL) { p=head; printf("本通訊錄現在共有%d人:/n",n); printf("---姓名-------職業--------手機-------Email-------通訊地址/n"); printf("==================================/n"); do { printf("== %s",p->name); printf(" "); printf("%s",p->work); printf(" "); printf("%s",p->handset); printf(" "); printf("%s",p->email); printf(" "); printf("%s",p->address); printf(" /n"); p=p->next; }while(p!=NULL); printf("==================================/n"); } else printf("通訊錄為空,無法輸出!/n"); } //增加函數 struct address_list *insert(struct address_list *head) { struct address_list *p0,*p1,*p2; char name[20]; p1=head; printf("請輸入增加的內容:/n"); printf("請輸入姓名:"); gets(name); if(strcmp(name,"0")==0) { printf("姓名不能為0,增加失敗!/n"); return(head); } else { p0=(struct address_list *)malloc(LEN); strcpy(p0->name,name); printf("請輸入職業:"); gets(p0->work); printf("請輸入手機:"); gets(p0->handset); printf("請輸入電子郵件:"); gets(p0->email); printf("請輸入通訊地址:"); gets(p0->address); n=n+1; if(head==NULL) { head=p0; p0->next=NULL; return head; } else { while(strcmp(p0->name,p1->name)>0&&(p1->next!=NULL)) { p2=p1; p1=p1->next; } if(strcmp(p0->name,p1->name)<0 || strcmp(p0->name,p1->name)==0) { if(head==p1) { head=p0; } else { p2->next=p0; } p0->next=p1; } else { p1->next=p0; p0->next=NULL; } return head; } } } struct address_list* delete_txl(struct address_list *head) { struct address_list *p,*q; char name[30]; if(head==NULL) { printf("通訊錄為空,無法顯示!/n"); return head; } p=head; printf("請輸入需要刪除的人的姓名:"); gets(name); if(strcmp(head->name,name)==0) { head=head->next; free(p); printf("刪除操作成功！/n"); return head; } else { q=head,p=head->next; while(p!=NULL) { if(strcmp(p->name,name)==0) { q->next=p->next; free(p); printf("刪除操作成功！/n"); return head; } p=p->next; q=q->next; } } } //顯示函數 struct address_list *display(struct address_list *head) { struct address_list *p1,*p2; char name[30]; int m; if(head==NULL) { printf("通訊錄為空,無法顯示!/n"); return head; } p1=head; m=0; printf("請輸入需要顯示人的姓名:"); gets(name); while(p1!=NULL) { while((strcmp(p1->name,name))!=0 && p1->next!=NULL) { p2=p1; p1=p1->next; } if(strcmp(p1->name,name)==0) { m++; printf("%s的通訊內容如下:/n",name); printf("---姓名--------職業--------手機-------Email------通訊地址/n"); printf("==================================/n"); printf("== %s",p1->name);printf(" "); printf("%s",p1->work);printf(" "); printf("%s",p1->handset);printf(" "); printf("%s",p1->email);printf(" "); printf("%s",p1->address); printf(" /n"); printf("==================================/n"); } p1=p1->next; } if(m==0) { printf("此人未在本通訊錄中!/n"); } return(head); } //排序函數 struct address_list *paixu(struct address_list *head) { struct address_list *p1,*p2; int i,j; struct address_list1 { char name[30]; char work[30]; char handset[30]; char email[30]; char address[30]; }; struct address_list1 px[200]; struct address_list1 temp; if(head==NULL) { printf("通訊錄為空,無法排序!/n"); return(head); } p1=head; for(i=0;i<n,p1!=NULL;i++) { strcpy(px[i].name,p1->name); strcpy(px[i].work,p1->work); strcpy(px[i].handset,p1->handset); strcpy(px[i].email,p1->email); strcpy(px[i].address,p1->address); p2=p1; p1=p1->next; } head=shifang(head); for(j=0;j<n-1;j++) { for(i=j+1;i<n;i++) { if(strcmp(px[i].name,px[j].name)<0) { temp=px[i]; px[i]=px[j]; px[j]=temp; } } } p1=(struct address_list *)malloc(LEN); p2=p1; strcpy(p1->name,px[0].name); strcpy(p1->work,px[0].work); strcpy(p1->handset,px[0].handset); strcpy(p1->email,px[0].email); strcpy(p1->address,px[0].address); head=p1; for(i=1;i<n;i++) { p1=(struct address_list *)malloc(LEN); strcpy(p1->name,px[i].name); strcpy(p1->work,px[i].work); strcpy(p1->handset,px[i].handset); strcpy(p1->email,px[i].email); strcpy(p1->address,px[i].address); p2->next=p1; p2=p1; } p2->next=NULL; printf("按姓名排序后為:/n"); print(head); return(head); } //姓名查找函數 struct address_list *search(struct address_list *head) { struct address_list *p1,*p2; int m; char name[30]; if(head==NULL) { printf("通訊錄為空,無法分類查找!/n"); return(head); } p1=head; printf("********************/n"); printf("** 請輸入需要查找的姓名 **/n"); printf("********************/n"); m=0; gets(name); while(p1!=NULL) { while(strcmp(p1->name,name)!=0&&p1->next!=NULL) { p2=p1; p1=p1->next; } if(strcmp(p1->name,name)==0) { m++; printf("你查找的內容是:/n"); printf("+++++++++++++++++++++++++++++++++++/n"); printf("++ %s %s %s %s %s/n",p1->name,p1->work,p1->handset,p1->email,p1->address); printf("+++++++++++++++++++++++++++++++++++/n"); } p1=p1->next; if(m==0) { printf("此人未在本通訊錄中!/n"); } break; } return(head); } //釋放內存函數 struct address_list *shifang(struct address_list *head) { struct address_list *p1; while(head!=NULL) { p1=head; head=head->next; free(p1); } return(head); } //文件寫入函數 void save(struct address_list *head) { FILE *fp; struct address_list *p1; char tong[30]; if(head==NULL) { printf("通訊錄為空,無法存儲!/n"); return; } printf("請輸入保存后的文件名:"); gets(tong); fp=fopen("(tong).txt","w"); if(fp==NULL) { printf("cannot open file/n"); return; } p1=head; fprintf(fp,"姓名 職業 手機 Email 通訊地址/n"); for(;p1!=NULL;) { fprintf(fp,"%s %s %s %s %s/n",p1->name,p1->work,p1->handset,p1->email,p1->address); p1=p1->next; } printf("保存完畢!/n"); fclose(fp); } //文件讀出函數 struct address_list *load(struct address_list *head) { FILE *fp; char tong[30]; struct address_list *p1,*p2; printf("請輸入要輸出的文件名:"); gets(tong); fp=fopen("(tong).txt","r"); if(fp==NULL) { printf("此通訊錄名不存在,無法輸出!/n"); return(head); } else { head=shifang(head); } p1=(struct address_list *)malloc(LEN); fscanf(fp,"%s%s%s%s%s",&p1->name,&p1->work,&p1->handset,&p1->email,&p1->address); if(feof(fp)!=0) { printf("文件為空,無法打開!/n"); return(head); } else { rewind(fp); p2=p1; head=p1; n=0; while(feof(fp)==0) { fscanf(fp,"%s%s%s%s%s",&p1->name,&p1->work,&p1->handset,&p1->email,&p1->address); if(feof(fp)!=0) break; p2->next=p1; p2=p1; p1=(struct address_list *)malloc(LEN); n=n+1; } p2->next=NULL; p1=head; head=head->next; n=n-1; free(p1); print(head); printf("打開完畢!/n"); return(head); } fclose(fp); } //綜合操作函數 struct address_list *menu(struct address_list *head) { char num[10]; while(1) { printf("*********************/n"); printf("*** 1 姓名查找 ****/n"); printf("*** 2 單個顯示 ****/n"); printf("*** 3 增加 ****/n"); printf("*** 4 退出 ****/n"); printf("*********************/n"); printf("請輸入您選擇的操作:"); gets(num); switch(*num) { case '1': { head=search(head); //姓名查找 print(head); } break; case '2': { head=display(head); //顯示 } break; case '3': { head=insert(head); //增加 print(head); } break; case '4': return head; default: printf("操作錯誤，此項不存在!/n"); break; } if(strcmp(num,"6")==0) break; } return head; } //主函數 void main() { struct address_list *head=NULL; char num[10]; printf("*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/n"); printf("*=* 程序說明 *=*/n"); printf("*=* 請及時保存創建完畢的通訊錄內容! *=*/n"); printf("*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/n"); while(1) { printf("************************/n"); printf("*** 1 創建通訊錄 ****/n"); printf("*** 2 按名字排序 ****/n"); printf("*** 3 綜合操作 ****/n"); printf("*** 4 保存 ****/n"); printf("*** 5 打開 ****/n"); printf("*** 6 刪除 ****/n"); printf("*** 7 退出 ****/n"); printf("************************/n"); printf("請輸入您選擇的操作:"); gets(num); switch(*num) { case '1': { if(head==NULL) { head=creat(); //創建 print(head); } else { head=shifang(head); head=creat(); //重新創建 print(head); } } break; case '2': { head=paixu(head); //排序 } break; case '3': { head=menu(head); //綜合操作 } break; case '4': { save(head); //文件保存 print(head); } break; case '5': { head=load(head); //文件輸出 } break; case '6': { head=delete_txl(head); //刪除 print(head); } break; case '7': head=shifang(head); break; default: printf("操作錯誤，此項不存在!/n"); break; } if(strcmp(num,"7")==0) break; } }以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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