#include <stdio.h>
#include <sqlite3.h>
int do_insert(sqlite3 *db);
int do_delete(sqlite3 *db);
int do_update(sqlite3 *db);
int do_select(sqlite3 *db);
int main(int argc, const char *argv[])
{
//创建并打开一个数据库
sqlite3 *db = NULL;
if(sqlite3_open("./my.db", &db) != SQLITE_OK)
{
fprintf(stderr, "sqlite3_open : %s %d __%d__\n",\
sqlite3_errmsg(db), sqlite3_errcode(db), __LINE__);
return -1;
}
printf("sqlite3_open my.db success\n");
//创建数据库表 create table stu(id int, name char, score float);
char sql[128] = "create table if not exists stu(id int, name char, score float);";
char *errmsg = NULL;
if(sqlite3_exec(db, sql, NULL, NULL, &errmsg) != SQLITE_OK)
{
fprintf(stderr, "sqlite3_exec: %s %d __%d__\n", errmsg, sqlite3_errcode(db), __LINE__);
return -1;
}
printf("create table stu success\n");
while(1)
{
char choose = 0;
printf("**************\n");
printf("****1.插入****\n");
printf("****2.删除****\n");
printf("****3.修改****\n");
printf("****4.查找****\n");
printf("****5.退出****\n");
printf("**************\n");
printf("请输入>>>");
choose = getchar();
while(getchar()!=10); //循环读取字符,直到读取到\n退出循环
switch(choose)
{
case '1':
do_insert(db);
break;
case '2':
do_delete(db);
break;
case '3':
do_update(db);
break;
case '4':
// do_select(db);
break;
case '5':
goto END;
break;
default:
printf("输入错误\n");
break;
}
}
END:
//关闭数据库
if(sqlite3_close(db) != SQLITE_OK)
{
fprintf(stderr, "sqlite3_close: %s %d __%d__\n",\
sqlite3_errmsg(db), sqlite3_errcode(db), __LINE__);
return -1;
}
printf("sqlite3_close my.db success\n");
return 0;
}
int do_insert(sqlite3 *db)
{
//插入一条数据 insert into stu values(1, 'zs', 80.5);
char *errmsg = NULL;
char table[20]="";
int id = 0;
char name[20] = "";
float score =0;
printf("输入格式:表名 id 姓名 成绩:");
scanf("%s %d %s %f", table, &id, name, &score);
while(getchar()!=10);
char sql[128] = "";
sprintf(sql, "insert into %s values(%d, '%s', %.2f)\n", table,id, name, score);
printf("%s", sql);
if(sqlite3_exec(db, sql, NULL, NULL, &errmsg) != SQLITE_OK)
{
fprintf(stderr, "sqlite3_exec: %s %d __%d__\n", errmsg, sqlite3_errcode(db), __LINE__);
return -1;
}
printf("insert into %s success\n", table);
return 0;
}
int do_delete(sqlite3 *db)
{
//删除一条数据 delete from stu where id=1;
char *errmsg = NULL;
char table[20]="";
char cond[20]="";
printf("输入格式:表名 限制条件:");
scanf("%s %s", table, cond);
while(getchar()!=10);
char sql[128] = "";
sprintf(sql, "delete from %s where %s\n", table, cond);
printf("%s", sql);
if(sqlite3_exec(db, sql, NULL, NULL, &errmsg) != SQLITE_OK)
{
fprintf(stderr, "sqlite3_exec: %s %d __%d__\n", errmsg, sqlite3_errcode(db), __LINE__);
return -1;
}
printf("delete from %s success\n", table);
return 0;
}
int do_update(sqlite3 *db)
{
//修改一条数据 update stu set score=70 where id=1;
char *errmsg = NULL;
char table[20]="";
char cond[20]="";
char set[20]="";
printf("输入格式:表名 设置=字段 限制条件:");
scanf("%s %s %s", table, set, cond);
while(getchar()!=10);
char sql[128] = "";
sprintf(sql, "update %s set %s where %s\n", table, set, cond);
printf("%s", sql);
if(sqlite3_exec(db, sql, NULL, NULL, &errmsg) != SQLITE_OK)
{
fprintf(stderr, "sqlite3_exec: %s %d __%d__\n", errmsg, sqlite3_errcode(db), __LINE__);
return -1;
}
printf("update %s set success\n", table);
return 0;
}
sqlite3 插入
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转载自blog.csdn.net/qq_46766479/article/details/132333128
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