C++用mysql自带的头文件连接数据库

 #include  #include  #include #include #include using namespace std; MYSQL *conn; MYSQL_RES *res; MYSQL_ROW row; class people { public: char name[20]; int pid; int type; char phone[30]; public: people(int a){}; people(){ setall(); }; ~people(){}; public: void setall(); }; void people::setall() { cout<<"请输入该用户的编号"<>pid; cout<<"请输入该用户的名字"<>name; cout<<"请输入该用户的类型"<>type; cout<<"请输入该用户的联系方式"<>phone; } void save() { char sql[1000]; people a; sprintf(sql,"insert into student values(%d,'%s',%d,'%s')",a.pid,a.name,a.type,a.phone); if(mysql_query(conn, sql)) { printf("添加失败: (%s)\n",mysql_error(conn)); return; } else { printf("添加成功!\n"); return; } return; } void update(){ char sql[1000]; people a(1); cout<<"请输入你要更改的用户的编号:"; cin >> a.pid; cout<<"请输入你要此编号用户的姓名："; cin >> a.name; cout <<"请输入你要更改的用户的类型："; cin >> a.type; cout << "请输入你要更改的用户的电话："; cin >> a.phone; sprintf(sql,"update student set name = '%s',usetype=%d,phone='%s' where pid = %d",a.name,a.type,a.phone,a.pid); if(mysql_query(conn, sql)) { printf("更改失败： (%s)\n",mysql_error(conn)); return; } else { printf("更改成功!\n"); return; } return; } void del() { char sql[1000]; int pid; cout<<"请输入你要删除的人的编号"<>pid; sprintf(sql,"delete from student where pid = %d",pid); if(mysql_query(conn, sql)) { printf("删除 失败(%s)\n",mysql_error(conn)); return; } else { printf("删除成功!\n"); return; } return; } void menu() { cout<<"1.用户录入"<>s; if(s==2){show();} if(s==1){save();} if(s==3){update();} if(s==4){del();} if(s==5){mysql_close(conn);return 0;} cout<<"按任意键继续.."<