Qt Programming Language
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@jonb said in Qt Programming Language:
@Annabelle
Hi Annabelle,Yep, the latest screenshot allows us to see your code! You'll want to show us that when you have a question about your code. (At a later date if the code gets too long to show in that screen we'll have to do something else, but that can wait for now.)
A couple of points:
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Earlier you had a compilation error, about a funny character in the code, at line #9, I believe. It seems to be compiling now, I think, so you may have dealt with that. But your lines 9, 10 and 11 are just an open-curly-brace, a blank line, and then a close-curly-brace. These do nothing, and are not useful in your code. Delete lines 9 to 11 inclusive, or replace them with a single blank line which looks nice to us (a gap between the
#includeline and the start of yourmain()function), but you may not be fussed about blank lines/layout. -
As @aha_1980 has written, your program produces some lines of output sent to what is called "stdout" via your
std::coutlines. This should produce some output somewhere (which can presumably be read to you), but we cannot see where that might be. The development environment you are using, known as an "IDE", is in charge of where that goes.
What we can see is that the "Build log" tab you are displaying, which shows the results of compiling, does not seem to include this output. Maybe there is a different tab at the bottom, scrolled off to the right, which has some sort of "Output" pane to send to? Or --- and it gets confusing now, I am only guessing --- the "Build log" seems to be showing that when your IDE runs your "Hello World" program it does it by passing it to an internal CodeBlocks or CodeRunner program named
cb_console_runner.exe. Note the use of "console" there. It may be that opens up a "console" (like an output window) when it runs to display your program's output, and that might automatically go away when your program ends, I don't know.EDIT I think I now understand your IDE is Code::Blocks (not CodeRunner). I have done some brief Googling, which you may want to do, for
CodeBlocks stdout. There are indeed various hits about "how do I get to see the output from my program from CodeBlocks".If we take, say, https://stackoverflow.com/questions/28878911/how-can-i-get-console-output-in-code-block-ide, the guy there has a similar program to yours. One thing we are told is
Click on build->run or hit Ctrl+F10 and a new CMD Window should pop up, showing you your "Hello world!".
So that tells us it does indeed need to open a separate command/output window to send the output to. Does your screenreader tell you this window gets opened or read its content?
Then the last response there says:
Please include getchar() in the function before return statement. This happens because the computer is executing your program and doesn't wait for you to see the output. Including getchar(), at the end mandates it to wait for an input & in the meanwhile you can observe your output
I did wonder if this might be the case. Because your program outputs some lines and then simply terminates, it may well be that this console output window pops up when you run your program, shows the lines, and then immediately exits. So you/your screenreader may know nothing about it. You need to cause the program to "pause" before it exists so you can examine this output window.
I'm not a C++ expert, but I believe you should try inserting the following two lines after all your
std::coutlines and immediately before yourreturn 0;line:std::string input; std::getline(std::cin, input);If you do that, when you run your program I believe/hope it will not immediately run to exit as it does now. You will have to "find" that new output window and click the Enter key in it before it exits and then your program completes. Hopefully you can then get your screenreader to read it out before you press the key?
Here's a screenshot of what my project looks like now.
And here's a screenshot of the code.
@annabelle yeah, it seems to work somehow.
The output screen shows
Hello World!.The only strang thing is: according to your code there should have been more lines of output (all the lines you added after hello world).
Are you sure the latest code is compiled and you are not running an older version of your program?
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@annabelle yeah, it seems to work somehow.
The output screen shows
Hello World!.The only strang thing is: according to your code there should have been more lines of output (all the lines you added after hello world).
Are you sure the latest code is compiled and you are not running an older version of your program?
@aha_1980 said in Qt Programming Language:
@annabelle yeah, it seems to work somehow.
The output screen shows
Hello World!.The only strange thing is: according to your code there should have been more lines of output (all the lines you added after hello world).
Are you sure the latest code is compiled and you are not running an older version of your program?
This time I am running the newest version of the code, and here's what I get.
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@aha_1980 said in Qt Programming Language:
@annabelle yeah, it seems to work somehow.
The output screen shows
Hello World!.The only strange thing is: according to your code there should have been more lines of output (all the lines you added after hello world).
Are you sure the latest code is compiled and you are not running an older version of your program?
This time I am running the newest version of the code, and here's what I get.
@annabelle said in Qt Programming Language:
This time I am running the newest version of the code
Unfortunately, your latest code contains an error so it cannot be compiled. This means you are still running the old version. As a result, your output screen only contains "Hello world!" and nothing else.
Does your screenreader report the error details to you? You should have heard, "error: expected initializer before 'std'". Did you hear that?
Anyway, the error message is telling you that something is missing before 'std' on line 11. In your case, you are missing the open curly braces
{aftermain(). Punctuation is very important in C++ code, so you must pay careful attention to them. -
@annabelle said in Qt Programming Language:
This time I am running the newest version of the code
Unfortunately, your latest code contains an error so it cannot be compiled. This means you are still running the old version. As a result, your output screen only contains "Hello world!" and nothing else.
Does your screenreader report the error details to you? You should have heard, "error: expected initializer before 'std'". Did you hear that?
Anyway, the error message is telling you that something is missing before 'std' on line 11. In your case, you are missing the open curly braces
{aftermain(). Punctuation is very important in C++ code, so you must pay careful attention to them.@jksh said in Qt Programming Language:
@annabelle said in Qt Programming Language:
This time I am running the newest version of the code
Unfortunately, your latest code contains an error so it cannot be compiled. This means you are still running the old version. As a result, your output screen only contains "Hello world!" and nothing else.
Does your screenreader report the error details to you? You should have heard, "error: expected initializer before 'std'". Did you hear that?
Anyway, the error message is telling you that something is missing before 'std' on line 11. In your case, you are missing the open curly braces
{aftermain(). Punctuation is very important in C++ code, so you must pay careful attention to them.My screenreader didn't tell me that particular error. Should I create a separate line with just an { on it?
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@jksh said in Qt Programming Language:
@annabelle said in Qt Programming Language:
This time I am running the newest version of the code
Unfortunately, your latest code contains an error so it cannot be compiled. This means you are still running the old version. As a result, your output screen only contains "Hello world!" and nothing else.
Does your screenreader report the error details to you? You should have heard, "error: expected initializer before 'std'". Did you hear that?
Anyway, the error message is telling you that something is missing before 'std' on line 11. In your case, you are missing the open curly braces
{aftermain(). Punctuation is very important in C++ code, so you must pay careful attention to them.My screenreader didn't tell me that particular error. Should I create a separate line with just an { on it?
@annabelle yes, please add
{on a new line directly after the line withmain. -
@annabelle yes, please add
{on a new line directly after the line withmain.@aha_1980 said in Qt Programming Language:
@annabelle yes, please add
{on a new line directly after the line withmain.Here's a screenshot of a new version.
Here's where I'm confused. There's an error message in a few places that says, "cout in namespace std does not name a type.". What does this mean? Also, it seems that when I just put an { on a blank line, Codeblocks automatically puts a line below with a couple spaces, followed by a line with a single }. What's up with that, I wonder? -
@aha_1980 said in Qt Programming Language:
@annabelle yes, please add
{on a new line directly after the line withmain.Here's a screenshot of a new version.
Here's where I'm confused. There's an error message in a few places that says, "cout in namespace std does not name a type.". What does this mean? Also, it seems that when I just put an { on a blank line, Codeblocks automatically puts a line below with a couple spaces, followed by a line with a single }. What's up with that, I wonder?@annabelle said in Qt Programming Language:
when I just put an { on a blank line, Codeblocks automatically puts a line below with a couple spaces, followed by a line with a single }. What's up with that, I wonder?
Code::Blocks was trying to be helpful. Often, when people type
{, they also want a corresponding}. The "couple of spaces" marks the location where people normally type in their code. (The code goes between{and}).However, you already had the closing
}on your last line, so Code::Blocks ended up introducing another error. You must always check the characters that are automatically typed by your IDE. If it is not appropriate, you must remove it.Here's where I'm confused. There's an error message in a few places that says, "cout in namespace std does not name a type.". What does this mean?
This error was caused when a
}was inserted into your code.std::coutis not a type, so it can only be used inside a function body, between{and}. You will learn more about types and functions as you work through the learncpp.com tutorial. -
@annabelle said in Qt Programming Language:
when I just put an { on a blank line, Codeblocks automatically puts a line below with a couple spaces, followed by a line with a single }. What's up with that, I wonder?
Code::Blocks was trying to be helpful. Often, when people type
{, they also want a corresponding}. The "couple of spaces" marks the location where people normally type in their code. (The code goes between{and}).However, you already had the closing
}on your last line, so Code::Blocks ended up introducing another error. You must always check the characters that are automatically typed by your IDE. If it is not appropriate, you must remove it.Here's where I'm confused. There's an error message in a few places that says, "cout in namespace std does not name a type.". What does this mean?
This error was caused when a
}was inserted into your code.std::coutis not a type, so it can only be used inside a function body, between{and}. You will learn more about types and functions as you work through the learncpp.com tutorial.@jksh said in Qt Programming Language:
@annabelle said in Qt Programming Language:
when I just put an { on a blank line, Codeblocks automatically puts a line below with a couple spaces, followed by a line with a single }. What's up with that, I wonder?
Code::Blocks was trying to be helpful. Often, when people type
{, they also want a corresponding}. The "couple of spaces" marks the location where people normally type in their code. (The code goes between{and}).However, you already had the closing
}on your last line, so Code::Blocks ended up introducing another error. You must always check the characters that are automatically typed by your IDE. If it is not appropriate, you must remove it.Here's where I'm confused. There's an error message in a few places that says, "cout in namespace std does not name a type.". What does this mean?
This error was caused when a
}was inserted into your code.std::coutis not a type, so it can only be used inside a function body, between{and}. You will learn more about types and functions as you work through the learncpp.com tutorial.Now I'm getting an error that says, "Expected Unqualified ID before Return"
And another that says, "Expected Declaration before }". What am I doing wrong? It seems I'm following the tutorial closely, but I'm stuck. -
@jksh said in Qt Programming Language:
@annabelle said in Qt Programming Language:
when I just put an { on a blank line, Codeblocks automatically puts a line below with a couple spaces, followed by a line with a single }. What's up with that, I wonder?
Code::Blocks was trying to be helpful. Often, when people type
{, they also want a corresponding}. The "couple of spaces" marks the location where people normally type in their code. (The code goes between{and}).However, you already had the closing
}on your last line, so Code::Blocks ended up introducing another error. You must always check the characters that are automatically typed by your IDE. If it is not appropriate, you must remove it.Here's where I'm confused. There's an error message in a few places that says, "cout in namespace std does not name a type.". What does this mean?
This error was caused when a
}was inserted into your code.std::coutis not a type, so it can only be used inside a function body, between{and}. You will learn more about types and functions as you work through the learncpp.com tutorial.Now I'm getting an error that says, "Expected Unqualified ID before Return"
And another that says, "Expected Declaration before }". What am I doing wrong? It seems I'm following the tutorial closely, but I'm stuck.@annabelle said in Qt Programming Language:
What am I doing wrong? It seems I'm following the tutorial closely, but I'm stuck.
Accuracy is very important in programming. You must follow the tutorial down to the nearest character.
Now I'm getting an error that says, "Expected Unqualified ID before Return"
And another that says, "Expected Declaration before }".Interpreting and fixing errors is also a very important part of programming. Always focus on the first error message, because fixing that will likely remove many subsequent errors.
Anyway, "Expected Unqualified ID before Return" is probably caused by more issues in punctuation -- for example, a
{that doesn't have a matching}. I can't see your latest code so I can't find the exact error.It might be easier to erase the contents of main.cpp and type them out again carefully. See if you can restore your working "Hello World" code first. After it builds and runs without errors, start making modifications.
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@jksh said in Qt Programming Language:
@annabelle said in Qt Programming Language:
when I just put an { on a blank line, Codeblocks automatically puts a line below with a couple spaces, followed by a line with a single }. What's up with that, I wonder?
Code::Blocks was trying to be helpful. Often, when people type
{, they also want a corresponding}. The "couple of spaces" marks the location where people normally type in their code. (The code goes between{and}).However, you already had the closing
}on your last line, so Code::Blocks ended up introducing another error. You must always check the characters that are automatically typed by your IDE. If it is not appropriate, you must remove it.Here's where I'm confused. There's an error message in a few places that says, "cout in namespace std does not name a type.". What does this mean?
This error was caused when a
}was inserted into your code.std::coutis not a type, so it can only be used inside a function body, between{and}. You will learn more about types and functions as you work through the learncpp.com tutorial.Now I'm getting an error that says, "Expected Unqualified ID before Return"
And another that says, "Expected Declaration before }". What am I doing wrong? It seems I'm following the tutorial closely, but I'm stuck.@annabelle
As I said before, when you show us these screenshots we need to see the code file being compiled open in the main pane, so that we can see what you have written. You need to do that every time you want to ask a question about your code!
