通讯录：
#include<stdio.h>//注意函数不要嵌套，最好模块化；
#include<string.h>
#include<sqlite3.h>
sqlite3 *ppdb;
char * errmsg;
char sql[32];
int ret;
int callback(void * a,int argc,char**argv,char **col)//注意void * 要加个参数；
{
int i;
for(i=0;i<argc;i++)
{
printf("%s=%s\n",col[i],argv[i]);
}
return 0;
}
void xianshi()//显示都要调用回调函数；
{
bzero(sql,32);
strcpy(sql," select *from tongxunlu;");
sqlite3_exec(ppdb,sql,callback,NULL,&errmsg);
}
void chaxun()
{
printf("1-通过名字查询\n");
printf("2-通过号码查询\n");
printf("请输入数字选择查询方式\n");
int g;
scanf("%d",&g);
char buf[125];
bzero(buf,125);
if(g==1)
{
printf("请输入名字\n");
scanf("%s",buf);
//fgets(buf,125,stdin);//用这个buf后面有回车，不能成功调用函数；
sprintf(sql,"select * from tongxunlu where name like '%%%s%%';",buf);//c语言识别的时候两个%号，相当于一个百分号，这里用模糊搜索法；
ret=sqlite3_exec(ppdb,sql,callback,NULL,&errmsg);
if(ret!=SQLITE_OK )
{
printf("error2 =%s\n",errmsg);
sqlite3_free(errmsg);
}
}
if(g==2)
{
printf("请输入号码\n");
scanf("%s",buf);
//fgets(buf,125,stdin);
sprintf(sql,"select * from tongxunlu where num='%s';",buf);
sqlite3_exec(ppdb,sql,callback,NULL,&errmsg);
ret=sqlite3_exec(ppdb,sql,callback,NULL,&errmsg);
if(ret!=SQLITE_OK )
{
printf("error2 =%s\n",errmsg);
sqlite3_free(errmsg);
}
}
}
char buf1[125];
char buf2[125];
void tianjia()
{
printf("请分别输入联系人的名字和号码\n");
scanf("%s",buf1);
scanf("%s",buf2);
bzero(sql,32);
sprintf(sql,"insert into tongxunlu values('%s','%s');",buf1,buf2);
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
}
void xiugai()
{
bzero(sql,32);
bzero(buf1,125);
bzero(buf2,125);
printf("1-修改联系人名字\n");
printf("2-修改联系人号码\n");
printf("请进行选择\n");
int h;
scanf("%d",&h);
if(h==1)
{
printf("请输入要变化成的名字和不用修改的号码\n");
scanf("%s",buf1);
scanf("%s",buf2);
sprintf(sql,"update tongxunlu set name='%s' where num='%s';",buf1,buf2);
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
}
if(h==2)
{
bzero(buf1,125);
bzero(buf2,125);
printf("请输入不用修改的名字和要变化成的号码和\n");
scanf("%s",buf1);
scanf("%s",buf2);
sprintf(sql,"update tongxunlu set num='%s' where name='%s';",buf2,buf1);
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
}
}
void shanchu()
{
printf("请输入你要删除联系人名字\n");
bzero(buf1,125);
scanf("%s",buf1);
sprintf(sql,"delete from tongxunlu where name='%s';",buf1);
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
}
void chuanjian()
{
strcpy(sql,"CREATE TABLE tongxunlu(name varchar(10) NOT NULL,num varchar(13) NOT NULL);");
ret=sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
if(ret!=SQLITE_OK )
{
printf("error2 =%s\n",errmsg);
sqlite3_free(errmsg);
}
}
void chushihua()
{
bzero(sql,32);//插入三条联系人信息
strcpy(sql,"insert into tongxunlu values('曹博','18163980137');");
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
bzero(sql,32);
strcpy(sql,"insert into tongxunlu values('何煌','18163980138');");
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
bzero(sql,32);
strcpy(sql,"insert into tongxunlu values('曾翔武','17352641850');");
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
}
void shanchubiao()
{
strcpy(sql,"drop table tongxunlu;");
sqlite3_exec(ppdb,sql,NULL,NULL,&errmsg);
}
int main()
{
char *filename="tongxunlu.db";//建表
ret = sqlite3_open("tongxunlu.db", &ppdb );//share文件下面会有这个数据库文件，可以用sqlite3打开进行相关的操作；
if(ret!=SQLITE_OK )
{
printf("error1 =%s\n",errmsg);
sqlite3_free(errmsg);
}
while(1)
{
printf("******曹博的通讯录*******\n");
printf("0-退出通讯录系统\n");
printf("1-显示所有人\n");
printf("2-查询某个联系人\n");
printf("3-添加联系人\n");
printf("4-修改联系人\n");
printf("5-删除联系人\n");
printf("6-创建表\n");
printf("7-初始化插入三条数据\n");
printf("8-删除表\n");
printf("请输入你要进行的操作\n");
int i;
scanf("%d",&i);
switch(i)
{
case 1:xianshi();
break;
case 2:chaxun();
break;
case 3:tianjia();
break;
case 4:xiugai();
break;
case 5:shanchu();
break;
case 6:chuanjian();
break;
case 7:chushihua();
break;
case 8:shanchubiao();
break;
default:
break;
}
if(i==0)
{
printf("退出通讯录系统\n");
break;
}
}
sqlite3_close(ppdb);
return 0;
}