SQLITE3数据库实现信息的增删改查

#include <myhead.h>

#include <sqlite3.h>

typedef struct

{

int id;

char name $20$ ;

int age;

int money;

}woker;

int callbake(void *arg,int n,char **a,char **b)//回调输出查找到的工人信息

{

for(int i =0;i<n;i++)

{

printf("%s\t",*(b+i));

}

putchar(10);

for(int i=0;i<n;i++)

{

printf("%s\t",*(a+i));

}

putchar(10);

printf("查找成功\n");

return 0;

}

int do_insert(sqlite3 *ppDb)

{

woker work;

printf("请输入工号\n");

scanf("%d",&work.id);

printf("请输入工姓名\n");

scanf("%s",work.name);

printf("请输入年龄\n");

scanf("%d",&work.age);

printf("请输入薪资\n");

scanf("%d",&work.money);

char *errmsg = NULL;//存储错误信息

char sqlite $100$ ;//插入一个工人信息

snprintf(sqlite,sizeof(sqlite),"insert into Work values(%d ,\"%s\", %d, %d);",work.id,work.name,work.age,work.money);

if(sqlite3_exec(ppDb,sqlite,NULL,NULL,&errmsg)!=0)//实现插入一个员工信息

{

perror("sqlite3_exec");

printf("错误码：%d错误信息：%s,出错行:%d\n",

sqlite3_errcode(ppDb),sqlite3_errmsg(ppDb),LINE);

printf("错误信息：%s\n",errmsg);

return -1;

}

printf("添加成功\n");

}

int do_reserch(sqlite3 *ppDb)

{

printf("请输入要查的员工姓名\n");

char key $100$ ;

scanf("%s",key);

char *errmsg = NULL;//存储错误信息

char sqlite $100$ ;

snprintf(sqlite,sizeof(sqlite),"select * from Work where name==\"%s\";",key);

if(sqlite3_exec(ppDb,sqlite,callbake,NULL,&errmsg)!=0)//查找一个工人信息

{

perror("sqlite3_exec");

printf("错误码：%d错误信息:%s,出错行：%d\n",sqlite3_errcode(ppDb),sqlite3_errmsg(ppDb),LINE);

printf("错误信息：%s\n",errmsg);

return -1;

}

printf("查找成功\n");

}

int do_delete(sqlite3 *ppDb)

{

printf("请输入要删除的员工信息\n");

char key $20$ ;

scanf("%s",key);

char *errmsg = NULL;

char sqlite $100$ ;

snprintf(sqlite,sizeof(sqlite),"delete from Work where name == \"%s\";",key);

if(sqlite3_exec(ppDb,sqlite,NULL,NULL,&errmsg)!=0)

{

perror("sqlite3_exec");

printf("错误码：%d错误信息:%s,出错行：%d\n",sqlite3_errcode(ppDb),sqlite3_errmsg(ppDb),LINE);

printf("错误信息：%s\n",errmsg);

return -1;

}

printf("删除成功\n");

}

int do_updata(sqlite3 *ppDb)

{

printf("请输入你要修改的员工姓名\n");

char key $20$ ;

scanf("%s",key);

printf("请输入你想修改员工的什么信息\n");

printf("\t1.工号\n");

printf("\t2.姓名\n");

printf("\t3.年龄\n");

printf("\t4.薪资\n");

printf("\t5.全部修改\n");

int n;

scanf("%d",&n);

getchar();

char *errmsg = NULL;

char sqlite $100$ ;

switch(n)

{

case 1:

printf("新工号\n");

int a;

scanf("%d",&a);

getchar();

snprintf(sqlite,sizeof(sqlite),"update Work set id =%d where name == \"%s\";",a,key);

break;

case 2:

printf("新姓名\n");

char arr $20$ ;

scanf("%s",arr);

getchar();

snprintf(sqlite,sizeof(sqlite),"update Work set name =\"%s\" where name == \"%s\";",arr,key);

break;

case 3:

printf("新年龄\n");

int b;

scanf("%d",&b);

getchar();

snprintf(sqlite,sizeof(sqlite),"update Work set age = %d where name == \"%s\";",b,key);

break;

case 4:

printf("新薪资\n");

int c;

scanf("%d",&c);

getchar();

snprintf(sqlite,sizeof(sqlite),"update Work set money = %d where name == \"%s\";",c,key);

break;

case 5:

break;

}

if(sqlite3_exec(ppDb,sqlite,NULL,NULL,&errmsg)!=0)

{

perror("sqlite3_exec");

printf("错误码：%d错误信息:%s,出错行：%d\n",sqlite3_errcode(ppDb),sqlite3_errmsg(ppDb),LINE);

printf("错误信息：%s\n",errmsg);

return -1;

}

printf("更改成功\n");

}

void mnue(sqlite3 *ppDb)

{

printf("--------狗熊岭员工信息表--------\n");

printf("\t1,插入一个成员的信息\n");

printf("\t2,删除一个成员的信息\n");

printf("\t3,修改一个成员的信息\n");

printf("\t4,查找一个成员的信息\n");

printf("\t0.退出\n");

printf("请输入你的选择\n");

int n;

scanf("%d",&n);

getchar();

switch(n)

{

case 1:

do_insert(ppDb);

break;

case 2:

do_delete(ppDb);

break;

case 3:

do_updata(ppDb);

break;

case 4:

do_reserch(ppDb);

break;

case 5:

//do_showall(ppDb);

break;

case 0:

exit(0);

break;

default:

printf("输入错误\n");

}

int main(int argc, const char *argv\[\])

{

sqlite3 *ppDb;//1.创建或打开一个数据库文件

int k = sqlite3_open("./Workdata.dp",&ppDb);

if(k != SQLITE_OK)

{

perror("sqlit3_open");

printf("错误码:%d错误信息：%s, 出错行是%d\n",

sqlite3_errcode(ppDb),sqlite3_errmsg(ppDb),LINE);

return -1;

}

printf("数据库打开成功\n");

//2.创建表格

char *errmsg = NULL;

char sqlite $100$ = "create table if not exists Work(id int,name char,age int,money int);";//创建一个表格

//printf("");

if(sqlite3_exec(ppDb,sqlite,NULL,NULL,&errmsg)!=0)

{

perror("sqlite3_exec");

printf("错误码：%d,错误信息：%s,出错的行:%d\n",

sqlite3_errcode(ppDb),sqlite3_errmsg(ppDb),LINE);

printf("错误信息：%s\n",errmsg);

return -1;

}

while(1)

{

mnue(ppDb);//数据库指针作为参数

}

sqlite3_close(ppDb);

return 0;

}