vb函数代码 0 x<0 y= 1 0≤x≤1 2 x≥1 用if条
表达应该是 iif(x>0,1,iif(x<0,-1,0)), if 是VB的分支语句保留字 iif函数意义在 iif(条件,表达式1,表达式2) 如果条件成立,取表达式1的值,否则取表达式2的值。iif(x>0,1,iif(x<0,-1,0))=iif(x<0,-1,0) '因为x=0,所以x>0不成立,取表达式2的值 =0 '因为...
VB编程 计算分段函数:y=1(x>0) y=0(x=0) y=-1(x<0)
int main(){ int x = 0;scanf("%d",&x);if(x < 0)printf("-1");else if( x == 0)printf("0");else printf("1");return 0;} 2,#include<stdio.h> int main(){ float a,b,c;scanf("%f%f%f",&a,&b,&c);if(a > b)a = a+b - (b = a);if(c < a){ c ...
vb的题,已知一个分段函数,y=-2x+1 x<0,0 x=0,2x+1=0 x>0 输入x值求y...
dim y as single x = inputbox("输入x的值:")if x<0 then y= -2*x+1 elseif x=0 y=0 else y = 2*x+1 end if print y
用VB输入函数输入一个数字,判断是正数、负数还是零?
x=0-i if x>0 then text2.text="这个数是负数"elseif x=0 then text2.text="这个数是零"else text2.text="这个数是正数"end if end sub
怎么在VB中用IF函数
公式:=IF(VLOOKUP(B3,全员一览表!B:AD,25,0)=0,"",VLOOKUP(B3,全员一览表!B:AD,25,0))。=IF(COUNTIF(key!B:B,H14)>0,"是","")。=IF(COUNTIF(key!B:B,H14)=0,"","是")。=IF(COUNTIF(key!B:B,H14),"是","")。例如IF(测试条件,结果1,结果2),即如果满足“测试条件...
vb:简易计算器(加减乘除)代码
Case Is = 2: y = y - x Case Is = 3: y = y * x Case Is = 4: y = y \/ x End Select t1 = 0 t = 0 l1.Caption = "0"End Sub Private Sub Form_Load()x = 0 y = 0 t = 0 t1 = 1 End Sub Private Sub c0_Click(Index As Integer)If l1.Caption = "0" ...
在VB中,怎么用IF语句编写程序
text2.text=sgn(x)就可以了 用select case做更方便 private sub command1_click()dim x as integer x=text1.text select case x case x<0 text2.text="-1"case x>0 text2.text="1"case x=0 text2.text="0"end select end sub 用if 也可以 private sub command1_click()dim x as...
编程实现:用if-else语句实现下列分段函数
不知道你使用的什么编程语言?给你vb参考:dim x as single,y as single if x<1 then y=x elseif x>=1 then y=3*x-11 else y=2*x-1 end if
关于VB里使用If Then Else 的问题
第一种:Private Sub Command1_Click() Dim x As Single, y As Single x = Val(Text1.Text) If x > 0 Then 'Then后面不能有除注释外的其他语句! y = x + 1 Else y = 5 * x End IfEnd Sub第二种:Private Sub Command1_Click() Dim x As Single,...
如何用VB求解二元一次方程
\/ (2 a)x2 = (-b - sqr(y))\/ (2 a)需要放在判断if y >= 0 then之后。修改:private sub command1_click()dim a as single,b as single,c as single dim x1 as single,x2 as single,y as single a = inputbox("a","求解二元一次方程")b = inputbox("b","求解二元一次...