negative-number

问题 I am trying to do some validation which checks if the value in a textbox is an integer then checks if the the value is negative. It correctly checks if the value is an integer but I can't get it to check if the value is negative. Note: The value being entered is the number of competitions attended so comps = competition etc... Dim comps As Integer Dim value As Double If Integer.TryParse(txtCompsEntered.Text, integer) Then value = txtCompsEntered.Text If value < 0 Then lblcompsatten.ForeColor

问题 This question already has answers here : “strlen(s1) - strlen(s2)” is never less than zero (3 answers) Closed 6 years ago . Here i am confused with condition statement which has negative number,if in the condition only negative number is given as if(-1) then it is true but if (-1>0) then it become false please explain any one thanks in advance if(-1) // This true why and how? if(-1>0)//This is false why and how Now what is impact in below code please help to understand #include <stdio.h>

问题 I know that -4 is copied into the EAX register. My doubts: -4 will be converted into two's complement binary notation before copying to EAX or not? If it is converted into two's complement binary notation , who does the job? Is there any special opcode for denoting negative numbers? What is the possible maximum negative number we can store in EAX register? Is there any special opcode or instructions for signed arithmetic? what happens when we multiply a negative and positive number in CPU?

问题 I am trying to figure out how the imul and idiv instructions of the 8086 microprocessor work. I know this: 1. mul and div are multiplications and division for unsigned numbers 2. imul and idiv, are also multiplications and divisions but for signed numbers I searched all the web, and what I just wrote above, that's the only info that I've found, but written in different ways. I have this: mov AX, 0FFCEh idiv AH Because ah it's a byte, AL=AX/AH (the result) and AH=remainder After the

问题 I know this is a common question, but I'm trying to create a TextField that only accept int numbers, and it's almost done, here's the code: Create textfield: nome = new JFormattedTextField(); nome.setHorizontalAlignment(SwingConstants.CENTER); nome.setColumns(2); DocumentFilter filtro = new FiltroNumero(); ((AbstractDocument) nome.getDocument()).setDocumentFilter(filtro); panel.add(nome); DocummentFilter: public class FiltroNumero extends DocumentFilter{ public void insertString

问题 In attempt to learn python by practicing, I am trying to implement and test out quick sort algorithm using python. The implementation itself was not difficult, however the result of the sort is somewhat puzzling: When I sort a list ['35', '-1', '-2', '-7', '-8', '-3', '-4', '20', '-6', '53'] the result gives me ['-1', '-2', '-3', '-4', '-6', '-7', '-8', '20', '35', '53'] So the list is sorted however the negative integers are sorted in reverse order. I suspect this may be the problem with the

问题 In attempt to learn python by practicing, I am trying to implement and test out quick sort algorithm using python. The implementation itself was not difficult, however the result of the sort is somewhat puzzling: When I sort a list ['35', '-1', '-2', '-7', '-8', '-3', '-4', '20', '-6', '53'] the result gives me ['-1', '-2', '-3', '-4', '-6', '-7', '-8', '20', '35', '53'] So the list is sorted however the negative integers are sorted in reverse order. I suspect this may be the problem with the

来源： https://stackoverflow.com/questions/30549077/accessing-an-element-of-an-array-through-negative-indexes

来源： https://stackoverflow.com/questions/30549077/accessing-an-element-of-an-array-through-negative-indexes

问题 Can I pass a negative int in printf while printing through format specifier %c since while printing int gets converted into an unsigned char? Is printf("%c", -65); valid? — I tried it on GCC but getting a diamond-like character(with question-mark inside) as output. Why? 回答1: Absolutely yes, if char is a signed type. C allows char to be signed or unsigned and in GCC you can switch between them with -funsigned-char and -fsigned-char. When char is signed it's exactly the same thing as this char