switch-statement

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . With the following code: case "GETSITES": case "SITESETUP": MessageBox.Show("Help! I am suffering from the Air-Conditioned Nightmare!!!"); // ... Will

问题 Although I have come up with a work-around using multiple if / else if statements, I am curious in knowing what looks wrong with my case statements, illustrated below: function [ar_vo,bucket] = revEng(v) ... s=solve(solve>0) * sqrt(T); ar_vo=s; bucket=ri(ar_vo); %%%%%%%%%%%%%%%%%%%%% function bucket = ri(ar_vo) % switch(ar_vo) % case ((ar_vo >= 0)&&(ar_vo < 0.005)) (1) % bucket=1; % case ((ar_vo >= 0.005)&&(ar_vo < 0.02)) (2) % bucket=2; % case ((ar_vo >= 0.02)&&(ar_vo < 0.05)) (3) % bucket=3

问题 I need to create the equivalent of a switch/case statement for strings in C++ with Qt. I believe that the simplest way is something like this (pseudo code) enum colours { red, green, blue }; QString array[] colour_names = { "red", "green", "blue" }; switch (color_names[user_string]) { case red: answer="Chose red"; case green: answer="Chose green"; case blue: answer="Chose blue"; other: answer="Invalid choice"; } But this doesn't take advantage of some of the features of Qt. I've read about

问题 If you have a switch statement and want certain code to be run when the value is one value or another how do you do it? The following code always goes to the default case. #include <iostream> using namespace std; int main() { int x = 5; switch(x) { case 5 || 2: cout << "here I am" << endl; break; default: cout << "no go" << endl; } return 0; } 回答1: Like this: switch (x) { case 5: case 2: cout << "here I am" << endl; break; } Known as "falling through". Just to point out that the reason the

问题 I have been searching around for days to find an answer to this performance based issue. After digging the Internet so far I have learned that there are couple of ways to use the Enums in java, well documented in here. Well, definitely as a starter one would like use Enums in a switch-case statement, which provides clarity and better understanding of the code. But on the other hand we have a Visitor pattern style implementation of the Enums as well, which ensures type safety and extensibility

问题 I have been searching around for days to find an answer to this performance based issue. After digging the Internet so far I have learned that there are couple of ways to use the Enums in java, well documented in here. Well, definitely as a starter one would like use Enums in a switch-case statement, which provides clarity and better understanding of the code. But on the other hand we have a Visitor pattern style implementation of the Enums as well, which ensures type safety and extensibility

问题 My intention is to call two cases inside another case in the same switch statement, switch (orderType) { case 1: statement 1; break; case 2: statement 2; break; case 3: **call case 1;** **Call case 2;** break; default: break;` } Can we do that in Java? 回答1: Although you cannot influence the switch cases directly, you can call switch's parent method from one case and pass different arguments. For example, void foo(int param1, String param2, ...) { switch (param1) { case 0: foo(1, "some string"

问题 What is the best way to check if variable is bigger than some number using switch statement? Or you reccomend to use if-else? I found such an example: int i; if(var1>var2) i = 1; if(var1=var2 i = 0; if(var1<var2) i = -1; switch (i); { case -1: do stuff; break; case 0: do stuff; break; case 1: do stuff; break; } What can you tell a novice about using "greater than or equal" in switch statements? 回答1: Not sure if this is what you're asking, but you could do it this way: int var1; int var2; int

问题 What is the best way to check if variable is bigger than some number using switch statement? Or you reccomend to use if-else? I found such an example: int i; if(var1>var2) i = 1; if(var1=var2 i = 0; if(var1<var2) i = -1; switch (i); { case -1: do stuff; break; case 0: do stuff; break; case 1: do stuff; break; } What can you tell a novice about using "greater than or equal" in switch statements? 回答1: Not sure if this is what you're asking, but you could do it this way: int var1; int var2; int

问题 What is the best way to check if variable is bigger than some number using switch statement? Or you reccomend to use if-else? I found such an example: int i; if(var1>var2) i = 1; if(var1=var2 i = 0; if(var1<var2) i = -1; switch (i); { case -1: do stuff; break; case 0: do stuff; break; case 1: do stuff; break; } What can you tell a novice about using "greater than or equal" in switch statements? 回答1: Not sure if this is what you're asking, but you could do it this way: int var1; int var2; int