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string to hex

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The Animal

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1

Wednesday, July 28th 2004, 11:59pm

string to hex

how can I change singe character to it's hex number in 2 digital format?
I try a few method but it isn't it, this cen be some links or examples

wysota

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2

Thursday, July 29th 2004, 12:06am

RE: string to hex

Try this:

Source code

 
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QString str;
        str = QString( "Decimal 63 is %1 in hexadecimal" )
                .arg( 63, 0, 16 );
        // str == "Decimal 63 is 3f in hexadecimal"


You'll probably have a problem though, when you try to convert something, that is less than 10h, because you'll probably not get the leading 0, but you can simply prepend '0' then.
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The Animal

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3

Thursday, July 29th 2004, 1:56pm

but its change only numbers and my program must change letter

wysota

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4

Thursday, July 29th 2004, 2:02pm

A letter is also a number... you can do .arg('A', 0, 16); and it will convert A into an appropriate hex representation.
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The Animal

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5

Thursday, July 29th 2004, 2:05pm

but I don't enter letter into code manualy but by QCString with I revice from server, and firs I must convrect it to char?

anda_skoa

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6

Thursday, July 29th 2004, 2:13pm

IF you get a string like this
"54"
You can first convert it to a number usign QString::toInt

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_
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The Animal

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7

Thursday, July 29th 2004, 2:21pm

I have string like this: "abc" not some int. If I have some numbers I know how to convrect to int but I don't know how to convrect letter to its hex number

wysota

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8

Thursday, July 29th 2004, 2:26pm

Source code

 
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QString str("abc");

for(int i=0; i<str.length();i++){
    char s = str[i];
    QString hexadecimal("%1").arg((int)s, 0, 16);
    // do something with it here
}
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anda_skoa

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9

Thursday, July 29th 2004, 4:13pm

QString::toInt

hint: second parameter
another hint: 16

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francesc

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10

Tuesday, March 1st 2005, 10:33pm

Well I was searching in the forum for convert a qstring to hex, but I have a problem compiling.

error: cannot convert `QCharRef' to `char' in initialization

wysota

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11

Tuesday, March 1st 2005, 10:41pm

Some code of yours would be helpful.
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francesc

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12

Wednesday, March 2nd 2005, 10:06am

Well, I do the next code a simple copy paste of your sample

QString str("abc");

for(int i=0; i<str.length();i++){
char s = str;
QString hexadecimal("%1").arg((int)s, 0, 16);
// do something with it here
}