c语言电话簿代码

#include <stdio.h> #include <string.h> #include <stdlib.h> struct person //创造结构体 { char name[8]; char tel[15]; }; char filename[20]; FILE *fp; //定义一个指向文件的指针变量fp void creat(); //创建一个通讯录 void output(); void search(); void append(); void modify(); void dele(); void main() { int m; char k; printf("\n请输入你要打开的通讯录文件名:"); gets(filename); if((fp=fopen(filename,"r"))==NULL) { printf("\n当前没有此通讯录文件,现在是否执行创建(Y/N)?:"); scanf("%c",&k); if(k!='Y'&&k!='N'&&k!='y'&&k!='n') { printf("\n输入有误,请再次输入一个值:"); scanf("%c",&k); } else if(k=='Y'||k=='y') { creat(); } else if(k=='N'||k=='n') { printf("\n由于你选择了退出,现在程序即将关闭!\n"); exit(0); //所在头文件为stdlib.h //功 能: 关闭所有文件，终止正在执行的进程。 } } else { printf("\n你要打开的通讯录文件%s已存在，现在可直接对其操作:\n",filename); printf("通讯录文件中现已有的通讯信息:\n"); output(); printf("\n请选择根据提示选择1~5对通讯录文件进行操作。\n"); } while (1) { printf("\n\n添加,请按1"); printf("\n查找,请按2"); printf("\n修改,请按3"); printf("\n删除,请按4"); printf("\n输出,请按5"); printf("\n退出,请按0\n"); scanf("%d",&m); if(m>=0&&m<=5) { switch(m) { case 0:exit(0); case 1: append();break; case 2: search();break; case 3: modify();break; case 4: dele();break; case 5:output();break; } printf("\n\n操作完毕,请再次选择!"); } else printf("\n\n操作错误，请再次选择!:"); } } /**********************************************************************/ void creat() { struct person one;printf("\n请输入通讯簿文件名:"); scanf("%s",filename); if ((fp=fopen(filename,"w"))==NULL) { printf("\n不能建立通讯薄!"); exit(0); } fprintf(fp,"%-10s%-20s%\n","姓名","电话号码"); //用格式化的方式读写文件 printf("\n请输入姓名:\n"); scanf("%s",one.name); while (strcmp(one.name,"0")) //用strcmp函数来处理,与"0"比较， //如果输入不为空，就是while(1)一直进行 //直到输入为空跳出 { printf("请输入电话号码:\n"); scanf("%s",one.tel); fprintf(fp,"%-10s%-20s%\n",one.name,one.tel); printf("请再输入另一个人的姓名,若想要结束,请输入0\n"); scanf("%s",one.name); } fclose(fp); } void output() { struct person one; if((fp=fopen(filename,"r"))==NULL) { printf("\n不能打开通讯薄!"); exit(0); } while (!feof(fp)) // feof(FILE*fp)输入输出函数，检查文件是否结束 //如果结束，则返回非零值，否则返回0 { fscanf(fp,"%s%s\n",one.name,one.tel); printf("%-10s%-20s%\n",one.name,one.tel); } fclose(fp); } void append() { struct person one; if ((fp=fopen(filename,"a"))==NULL) { printf("\n不能打开通讯薄!"); exit(0); } printf("\n请输入添加的姓名\n"); scanf("%s",one.name); printf("请输入电话号码:\n"); scanf("%s",one.tel); printf("%-10s%-20s%\n",one.name,one.tel); fprintf(fp,"%-10s%-20s%\n",one.name,one.tel); fclose(fp); } void search() { int flag=0; char namekey[8]; struct person one; printf("\n请输入姓名:"); scanf("%s",namekey); if((fp=fopen(filename,"r"))==NULL) { printf("\n不能打开通讯薄!"); exit(0); } while(!feof(fp)) { fscanf(fp,"%s%s\n",one.name,one.tel); if (!strcmp(namekey,one.name)) { printf("\n\n已查到，记录为:"); printf("\n%-10s%-20s%",one.name,one.tel); flag=1; } } if(!flag) printf("\n\n对不起，通讯薄中没有此人的记录。"); fclose(fp); } void modify() { int flag=0; long offset; char namekey[8]; struct person one;printf("\n请输入姓名:"); scanf("%s",namekey); if((fp=fopen(filename,"r+"))==NULL) { printf("\n不能打开通讯薄!"); exit(0); } while(!feof(fp)) { offset=ftell(fp); fscanf(fp,"%s%s\n",one.name,one.tel); if(!strcmp(namekey,one.name)) { flag=1;break; } } if(flag) { printf("\n已查到,记录为"); printf("\n%-10s%-20s%",one.name,one.tel); while (1) { printf("\n\n修改姓名,请按2"); printf("\n修改电话,请按3"); printf("\n退出,请按6\n"); scanf("%d",&flag); if (flag==2) { printf("请输入新的姓名\n"); scanf("%s",one.name); printf("修改完毕,请指示!:\n"); } if (flag==3) {printf("请输入新的电话\n"); scanf("%s",one.tel); printf("修改完毕,请指示!:\n"); } if (flag==6) break; } fseek(fp,offset,0); fprintf(fp,"%-10s%-20s%\n",one.name,one.tel); printf("\n%-10s%-20s%",one.name,one.tel); } else printf("不存在指定的名字!\n"); fclose(fp); } void dele() { int m,flag=0; long offset; char namekey[8]; struct person one; printf("\n请输入姓名:"); scanf("%s",namekey); if((fp=fopen(filename,"r+"))==NULL) { printf("\n不能打开通讯簿!"); exit(0); } while(!feof(fp)) { offset=ftell(fp); fscanf(fp,"%s%s\n",one.name,one.tel); if(!strcmp(namekey,one.name)) { flag=1; break; } } if(flag) { printf("\n已查到，记录为"); printf("\n%-10s%-20s%",one.name,one.tel); printf("\n确定要删除,按1;不删除,按0:"); scanf("%d",&m); if (m) { fseek(fp,offset,SEEK_SET); fprintf(fp,"%-10s%-20s\n","",""); } } else printf("\n对不起，通讯簿中没有此人的记录。"); fclose(fp); }