自己研究出来的
c语言源程序如下:
- #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;
- void creat(); //创建一个通讯录
- void output();
- void search();
- void append();
- void modify();
- void del();
- 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);
- }
- }
- 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 1: append();break;
- case 2: search();break;
- case 3: modify();break;
- case 4: del();break;
- case 5:output();break;
- case 0:exit(0);
- }
- 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%-30s%-20s\n","姓名","电话号码","住址","电子邮箱");
- printf("\n请输入姓名:\n");
- scanf("%s",one.name);
- while (strcmp(one.name,"0"))
- {
- 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))
- {
- 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 del()
- {
- 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);
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
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