When the post form is submitted, the parameter is not brought? What's going on?
The phenomenon and background of the problem post When the form is submitted , The parameter is not taken with Problem related code , Do not past...
2022-05-29 08:48【CSDN Q & A】
read morePHP recursively delete folders
img https://img mid.csdnimg.cn/release/static/image/mid/ask/135893212356131.png?x oss process=image/auto orient,1/resize,w 320,m lfit if Judging insi...
2022-05-29 08:52【CSDN Q & A】
read moreSolid state disk C (system disk) active time 100%
img https://img mid.csdnimg.cn/release/static/image/mid/ask/287181212356117.png?x oss process=image/auto orient,1/resize,w 320,m lfit Open one at a ...
2022-05-29 08:52【CSDN Q & A】
read moreSelect points to minimize the sum of weights
There is a graph , There are two types of points ：s、p.s The number of class points is n1,p The number of class points is n2 See the following two pic...
2022-05-29 08:57【CSDN Q & A】
read moreWriting of launch file in ROS
/ demand ： The official basic recommendation for static coordinate conversion tf2 ros Under the function package static transform publisher , as fo...
2022-05-29 08:57【CSDN Q & A】
read moreIn the parallel process of PETSc, is rstart the first line of the local line of a process, and is rend the last line of the local line of a process?
stay PETSc In the parallel process of When assigning a value to a matrix , for Ii=Istart; Ii Iend; Ii++ { v = 1.0; i = Ii/n; j = Ii i/ n; if i 0 {J...
2022-05-29 08:58【CSDN Q & A】
read moreI would like to ask you why the red color is not enough to fill the bottom box
The phenomenon and background of the problem Problem related code , Do not paste screenshots img https://img mid.csdnimg.cn/release/static/image/...
2022-05-29 09:01【CSDN Q & A】
read moreC language: for loop, to find data in the array, and how to find duplicate data
If input 60, How to put three in the array 60 All found , Output three serial numbers / include stdio.h int main { int i; float score 30 ={60,60,60,...
2022-05-29 09:02【CSDN Q & A】
read morePIP install Auto_ Ml stuck
img https://img mid.csdnimg.cn/release/static/image/mid/ask/744848212356143.png?x oss process=image/auto orient,1/resize,w 320,m lfit img https://img...
2022-05-29 09:02【CSDN Q & A】
read moreLook at the Java database connection problem!
img https://img mid.csdnimg.cn/release/static/image/mid/ask/583199212356111.png?x oss process=image/auto orient,1/resize,w 320,m lfit Cannot invoke '...
2022-05-29 09:02【CSDN Q & A】
read morePython create dictionary
Define a name create usernames dictionary usernames list Function of , This function takes a list of user names as arguments , And create a dictiona...
2022-05-29 09:26【CSDN Q & A】
read morePrintf output error
Problems encountered in the experiment of drawing typedef enum { DG, DN, UDG, UDN } GraphKind; // Directed graph , Directed net , Undirected graph ...
2022-05-29 09:26【CSDN Q & A】
read moreHow to bind a listener to this JPanel container so that it can move up, down, left and right by pressing the keyboard? This is my code
img https://img mid.csdnimg.cn/release/static/image/mid/ask/296764312356165.png?x oss process=image/auto orient,1/resize,w 320,m lfit How to jpanel ...
2022-05-29 09:26【CSDN Q & A】
read moreWhy does matlab show surf error in editor
Why will there be surf Wrong use of reminders ？ Enter the command , Show incorrect use surf,X,Y,Z Cannot be plural ？ What's the matter ？ img https:/...
2022-05-29 09:27【CSDN Q & A】
read more[calculate the value of the main and auxiliary diagonals] Why does the code look OK, but the result after entering the number is wrong
/ include stdio.h int main { int i,j,s1=0,s2=0,a 3 3 ; for i=0;i 3;i++ for j=0;j 3;j++ scanf '%d', a i j ; for i=0;i 3;i++ { s1+=a i j ; s2+=a i 2 i ;...
2022-05-29 09:27【CSDN Q & A】
read moreProteus microcontroller simulation, digital tube simulation why some numbers will not be displayed?
Want to display the output of an array ：arr 11 = { 3, 15, 2, 64, 487, 41, 888, 654, 9, 10}; img https://img mid.csdnimg.cn/release/static/image/mid/a...
2022-05-29 09:27【CSDN Q & A】
read moreProblems about arrays (C language)
Suppose an array arr【】=｛0｝; Then enter a number manually x=5, for（i=0;i x;i++） scanf '%d, arr i ;// Manually enter five numbers Why? arr【】 Do not w...
2022-05-29 09:27【CSDN Q & A】
read moreThe problem of C51 single chip microcomputer is solved. The newly learned knowledge is not deep enough, and I am strengthening my study. I have pondered this for a long time, but I still can't do my best. I hope you can see it. I already know how to displ
c51 The problem of single chip microcomputer , solve , The new knowledge is not deep enough , Strengthening learning , I've been thinking about this f...
2022-05-29 09:27【CSDN Q & A】
read moreThere is no problem connecting Android to MySQL code, no problem with settings, and no connection.
The following code , Let me talk about my solution ： 1. close mysql The firewall of the server . 1. Join in mysql Of jdbc package , Add to libs In ...
2022-05-29 09:38【CSDN Q & A】
read moreAfter opening excel, if the mouse is in the cell interface, it will always move to the right. If the mouse is in the menu bar, it will not move to the right
The phenomenon and background of the problem Currently open excel The back cell moves all the way to the right ; open win menu bar Will move al...
2022-05-29 09:38【CSDN Q & A】
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For raspberry pie experiment, how to convert the 8-bit data output through pcf8591 into actual data using some analog output sensors
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In the raspberry pie experiment, how do some analog output sensors convert the output value through pcf8591 into the actual value?
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