how i make a project that convert text to ascii numbers

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1.00/5 (3 votes)

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C

ascii numbers to text
text to ascii numbers
input: test case
output: 116 101 115 116 032 099 097 115 101

Posted 14-Dec-13 3:27am

Member 10466311

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PIEBALDconsult 14-Dec-13 9:35am

That sounds like homework. Break the problem down into smaller tasks and work on one at time.

Peter Leow 14-Dec-13 9:51am

What have you tried?

3 solutions

Solution 3

For my experiment, I accepted the input as a parameter and iterated it with a for loop as Griff Showed, but the following is all you need to display the "ASCII value" of each character:

printf(" %03d",argv[1][i])

Posted 14-Dec-13 19:39pm

PIEBALDconsult

Solution 1

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.

Try it yourself, you may find it is not as difficult as you think!

But...some hints:
This isn't a difficult task: you almost certainly know how to read a string in from the user, so there is no need to mention that bit.

When you read the string in, it sits in an array of characters, so you are going to need a loop to look at each character in turn: a for loop is probably the best:

C++

int index;
...
for (index = 0; lineFromUser[index] != '\0'; index++)
   {
   ...
   }

Inside the loop, you can get each character in turn by looking at lineFromUser[index] - which will give you each character in turn.
You presumably know how to output a number using printf or similar? So I don't need to cover that bit, either.
All you need to do is convert the character to an integer and output it, followed by a space...

C++

myInteger = (int) myCharacter;

Should do that bit...

Posted 14-Dec-13 4:01am

OriginalGriff

Comments

Member 10466311 14-Dec-13 10:09am

I just want some ideas for this project

OriginalGriff 14-Dec-13 10:14am

What ideas do you need?

PIEBALDconsult 14-Dec-13 11:42am

It's even asimpler than that -- especially accepting the input as a parameter.

OriginalGriff 14-Dec-13 11:44am

Judging by his need for "ideas" after that bunch of rather heavy hints I don't think he is quite ready for a computing career yet... :sigh:

PIEBALDconsult 14-Dec-13 12:13pm

At least it gave me an excuse to look at some of the C compilers I have available.

OriginalGriff 14-Dec-13 12:22pm

I have a blank VS project set up for that:
http://social.msdn.microsoft.com/Forums/en-US/79070c7c-e641-40b0-ba3e-6f8600669536/how-do-i-setup-a-project-for-straight-c-developement-not-c
(Since I am used to VS shortcuts and kept forgetting in other IDEs... :O )

PIEBALDconsult 14-Dec-13 14:35pm

Visual Studio, p'shaw. :rolleyes: The Microsoft C/C++ I have on my work laptop is one I tried -- but I used my own simple IDE. I am mildly surprised that it doesn't support for ( int i = 0 ; ... -- the newer of the HP C compilers I have for OpenVMS supports that. Borland's C/C++ also doesn't, and I've never gotten the MinGW gcc to work (I only use the pre-compiler).

OriginalGriff 14-Dec-13 15:41pm

I grew up with strict original C which didn't support declarations after any code in a function. I wasn't sure what compiler he is using, so I didn't want to use a syntax that might confuse a beginner even more...

Is that enough excuses, or shall I make some up as well? :laugh:

PIEBALDconsult 14-Dec-13 17:20pm

Me too, but I have become so used to declaring things willy-nilly in C# that it's just natural to me now.
It also eliminates a pair of braces in this case. :D
I also like preprocessors that allow the inclusion of a header file from the command line so I can remove them from the code.
But, yeah, if it only compiles on only one of the four compilers I tried, it can't be a good thing.

OriginalGriff 14-Dec-13 17:45pm

Yep! The problem I have if I'm switching between them is remembering where the stupid brackets go:
int myArray[] ... :doh:

PIEBALDconsult 14-Dec-13 18:01pm

From the VAX/DEC/Compaq/HP C documentation:
"In relaxed ANSI C mode, the first clause of the for statement can be a declaration whose scope includes the remaining clauses of the for header and the entire loop
body."

/STANDARD=RELAXED (equivalent to /NOSTANDARD)
The compiler accepts ANSI/ISO C Standard C89 and C99 features, as well as nearly all language extensions

"Placing a declaration in a for loop is a new feature in the C99 standard. Other C compilers may not support this extension."

It's odd though, that the ANSIC99 PDF I have says:
"
6.8.5.3 The for statement
The statement
for ( clause-1 ; expression-2 ; expression-3 ) statement
behaves as follows: The expression expression-2 is the controlling expression that is
evaluated before each execution of the loop body. The expression expression-3 is
evaluated as a void expression after each execution of the loop body. If clause-1 is a
declaration, the scope of any variables it declares is the remainder of the declaration and
the entire loop, including the other two expressions; it is reached in the order of execution
before the first evaluation of the controlling expression. If clause-1 is an expression, it is
evaluated as a void expression before the first evaluation of the controlling expression.134)
"
So if it's been in the standard for nearly fifteen years, why is there still so little adoption?

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ridoy · Accepted Answer · 2013-12-14T08:14:00

Solution 2

Well, this could be something like this:

C++

int t_as_int = (int)'t';
int e_as_int = (int)'e';
int s_as_int = (int)'s';
int t_as_int = (int)'t';
.........

So, this is the basic process of converting a character to equivalent ascii number. As you need this case for text, so loop through your text and get the characters, and then convert it to ascii by above way.That's it, hope you can understand what to do now.

Posted 14-Dec-13 8:14am

ridoy

Comments

PIEBALDconsult 14-Dec-13 14:37pm

No converting or even casting is necessary.

ridoy 14-Dec-13 14:46pm

For which you downvoted, right? OP asks for some ideas for the work and i only suggests him a way. Definitely this is one of the way of solution, not the only one.

PIEBALDconsult 14-Dec-13 14:54pm

I see a 3. Is a 3 a downvote now? Sounds like the car dealer we bought from recently saying that anything less than the top rating was a failure. I told him that anything less than us coming back is a failure.

ridoy 14-Dec-13 14:59pm

I see it as 2 first, and then found no it's a 3 and surprisingly found it is down-voted. I have never seen a 3 as down-vote before. Seems CP doesn't like anything rather than an up-vote, :)

PIEBALDconsult 14-Dec-13 15:02pm

Huh, maybe it will change its mind again.

ridoy 15-Dec-13 0:22am

maybe, or maybe not! :)

PIEBALDconsult 15-Dec-13 1:32am

You can't trust computers.