CREATE PROCEDURE [dbo].[GetNameById] @studentid varchar(8), @studentname nvarchar(50) OUTPUT AS BEGIN SELECT @studentname=studentname FROM student WHERE studentid=@studentid if @@Error<>0 RETURN -1 else RETURN 0 END using (SqlConnection conn = new S
CREATE PROCEDURE [dbo].[GetNameById] @studentid varchar(), @studentname nvarchar() OUTPUT AS BEGIN SELECT @studentname=studentname FROM student WHERE studentid=@studentid RETURN - else RETURN END using (SqlConnection conn = new SqlConnection(connStr)
1.从键盘输入两个整数,然后输出它们的平方值和立方值 在Java中,没有像C语言那样有一个专供接受键盘输入值的scanf函数,所以一般的做法是从键盘输入一行字符,保存到字符串s中,再将字符组成的字符串s转换为整型数据后返回 package mianshiti; import java.io.*; public class PrintResult { public static void main(String[] args) { Result result=new Result(); Syste
select * from ( SELECT 'C_DILEI' as fen,'地类' as fcn, 'NVARCHAR'as ftype, '2'as flen, ( SELECT count(1) FROM xbmbd WHERE len(ISNULL(C_DILEI,'')) > 2 ) as rnum, ( SELECT CAST(C_DILEI AS VARCHAR(50))+',' FROM xbmbd WHERE len(ISNULL(C_DILEI,'')) > 2 GRO
Unlike an unscoped enumeration, a scoped enumeration is not implicitly convertible to its integer value. You need to explicitly convert it to an integer using a cast: std::cout << static_cast<std::underlying_type<A>::type>(a) << st
//整型.浮点型变量表示的关键字,并给出它们各自的界值 #include<iostream> #include<climits> //包含整型数据范围的头文件 #include<cfloat> //包含浮点型数据范围的头文件 using namespace std; int main(){ int i; //整型 short j; //短整型 long k; //长整型 float ii; //单精度浮点型 double jj; //双精度浮点型 long double