# include<string.h>
struct tongxun
{char name[20]
char number[20]
struct tongxun *next
}
int all=0
struct tongxun* tj() /*创建链表并添加成员*//**/
{
struct tongxun *head=NULL
struct tongxun *p,*q
system("CLS")
p=q=(struct tongxun *)malloc(sizeof(struct tongxun))
for()
{printf("请输入姓名：（如果输入0则退出添加）\n")
scanf("%s",p->name)
if(!(strcmp(p->name,"0"))){ free(p)return head}
else {printf("请输入电话号码：\n")
scanf("%s",p->number)
all++
if(all==1)
{p->next=head
q=p
head=q}
else
{p->next=NULL
q->next=p
q=p
}
p=(struct tongxun *)malloc(sizeof(struct tongxun))
}
}
}
cz(struct tongxun *head) /*查找函数*/
{char name1[20],*a
struct tongxun *p
p=heada=name1
system("CLS")
printf("请输入要查找的姓名：\n")
scanf("%s",a)
while(p!=NULL)
{if((strcmp(p->name,a))==0) {printf("姓名：%s\n电话号码：%s\n",p->name,p->number)return}
else p=p->next
}
printf("没有此人\n")
return
}
insert(struct tongxun *head) /*插入新成员*/
{struct tongxun* pnew
pnew=(struct tongxun *)malloc(sizeof(struct tongxun))
while(1)
{printf("请输入姓名：（如果输入0则退出添加）\n")
scanf("%s",pnew->name)
if(!(strcmp(pnew->name,"0"))){ free(pnew)return head}
else {printf("请输入电话号码：\n")
scanf("%s",pnew->number)
all++
pnew->next=head
head=pnew
pnew=(struct tongxun *)malloc(sizeof(struct tongxun))
}
}
}
shuchu(struct tongxun *head)/*输出成员*/
{struct tongxun *p
p=head
printf("这里一共有%d个成员\n",all)
while(p!=NULL)
{printf("姓名：%s\n电话号码：%s\n",p->name,p->number)
p=p->next
}
}
xg(struct tongxun *head) /*修改成员*/
{char name1[20],*a
struct tongxun *p
p=heada=name1
system("CLS")
printf("请输入要修改的姓名：\n")
scanf("%s",a)
while(p!=NULL)
{if((strcmp(p->name,a))==0) {printf("请重新输入姓名：\n")
scanf("%s",p->name)
printf("请重新输入电话号码：\n")
scanf("%s",p->number)return}
else p=p->next
}
printf("没有此人\n")
return
}
sc(struct tongxun *head) /*删除成员*/
{char name1[20],*a
struct tongxun *p,*q
p=q=heada=name1
system("CLS")
printf("请输入要删除的姓名：\n")
scanf("%s",a)
while(p!=NULL)
{
if((strcmp(p->name,a))==0) {all--q->next=p->nextreturn}
else {q=pp=p->next}
}
printf("没有此人\n")
return
}
void main()
{struct tongxun *headint i
while(1)
{printf("请选择：\n")
printf("1.添加 2.查找 3.修改 4.删除5.插入 6.输出\n")scanf("%d",&i)
switch(i)
{case 1:head=tj()break
case 2:cz(head)break
case 3:xg(head)break
case 4:sc(head)break
case 5:insert(head)break
case 6:shuchu(head)break
default:printf("输入有误，请重新输入：\n")break
}
}
}
/*编程建立一通讯簿，存放有姓名、电话号码、住址，然后对通信簿进行查找、添加、修改及删除。*/#include<stdio.h>
struct person
{
char name[8]
char tel[15]
char addr[50]
}
char filename[20]
FILE *fp
void creat()
void output()
void search()
void append()
void modify()
void delete()
main()
{
int m
creat()
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: delete()
break
case 5: output()
break
case 0: exit()
}
printf("\n\n *** 作完毕，请再次选择！")
}
else
printf("\n\n选择错误，请再次选择！")
}
}
void creat()
{
struct person one
long s1
printf("\n请输入通讯簿名：")
scanf("%s",filename)
if((fp=fopen(filename,"w"))==NULL)
{
printf("\n不能建立通讯簿！")
exit()
}
fprintf(fp,"%-10s%-20s%-50s\n","姓名","电话号码","住址")
printf("\n请输入姓名、电话号码及住址（以0结束）\n")
scanf("%s",one.name)
while(strcmp(one.name,"0"))
{
scanf("%s%s",one.tel,one.addr)
fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.addr)
scanf("%s",one.name)
}
fclose(fp)
}
void output()
{
struct person one
if((fp=fopen(filename,"r"))==NULL)
{
printf("\n不能打开通讯簿！")
exit()
}
printf("\n\n%20s\n","通 讯 簿")
while(!feof(fp))
{
fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr)
printf("%-10s%-20s%-50s",one.name,one.tel,one.addr)
}
fclose(fp)
}
void append()
{
struct person one
if((fp=fopen(filename,"a"))==NULL)
{
printf("\n不能打开通讯簿！")
exit()
}
printf("\n请输入添加的姓名、电话号码及住址\n")
scanf("%s%s%s",one.name,one.tel,one.addr)
fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.addr)
fclose(fp)
}
void search()
{
int k=0
char namekey[8]
struct person one
printf("\n请输入姓名:")
scanf("%s",namekey)
if((fp=fopen(filename,"rb"))==NULL)
{
printf("\n不能打开通讯簿！")
exit()
}
while(!feof(fp))
{
fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr)
if(!strcmp(namekey,one.name))
{
printf("\n\n已查到，记录为：")
printf("\n%-10s%-18s%-50s",one.name,one.tel,one.addr)
k=1
}
}
if(!k)
printf("\n\n对不起，通讯簿中没有此人的记录。")
fclose(fp)
}
void modify()
{
int m,k=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()
}
while(!feof(fp))
{
offset=ftell(fp)
fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr)
if(!strcmp(namekey,one.name))
{
k=1
break
}
}
if(k)
{
printf("\n已查到，记录为：")
printf("\n%-10s%-18s%-50s",one.name,one.tel,one.addr)
printf("\n请输入新姓名、电话号码及住址：")
scanf("%s%s%s",one.name,one.tel,one.addr)
fseek(fp,offset,SEEK_SET)
printf("%ld",ftell(fp))
fprintf(fp,"%-10s%-20s%-50s\n",one.name,one.tel,one.addr)
}
else
printf("\n对不起，通讯簿中没有此人的记录。")
fclose(fp)
}
void delete()
{
int m,k=0,flag
long offset1,offset2
char namekey[8], valid[4]
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()
}
while(!feof(fp))
{
offset1=ftell(fp)
fscanf(fp,"%s%s%s\n",one.name,one.tel,one.addr)
if(!strcmp(namekey,one.name))
{
k=1
break
}
}
if(k)
{
printf("\n已查到，记录为")
printf("\n%-10s%-18s%-50s",one.name,one.tel,one.addr)
printf("\n确实要删除,按1；不删除，按0：")
scanf("%d",&m)
if(m)
{
fseek(fp,offset1,SEEK_SET)
fprintf(fp,"%-10s%-20s%-50s\n","","","")
}
}
else
printf("\n对不起，通讯簿中没有此人的记录。")
fclose(fp)
}
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