HEX to Decimal and Decimal to Hex

[youssef]

How I do to convert a decimal value to Hexa value and Hexa to Decimal value ?

Thanks

 

[Zyrenthian]

the decimal value is equivalent to hex... i dont completely follow what you mean.

int x = 255;
cout<<x<<endl<<hex<<x

will output

255
ff

you may also want to look into strtol... but I am not sure what you are trying to do.

Matt

 

[youssef]

Thank for help:

My source code for converting a hex string to decimal is :

// conversion hexa to decimal
{
char *temp;
UpdateData(TRUE);
m_dec = strtoul( m_hex, &temp, 16 );
UpdateData(FALSE);
}
m_hex is a editbox (CString)
and
m_dec is a editbox (long)

 

[Zyrenthian]

Not sure this will work as strtoul is looking for a char*

strtoul( m_hex, &temp, 16 );


Maybe try

m_dec = strtoul( (LPCTSTR)m_hex, &temp, 16 );


Matt

 

[Cagliostro]

Anny number variables are binary. Theirs string representation can be binary, octal/decimal/hexadecimal. If you want to use strings, you can use sptintf for char*, operator<< for ostreams:
char* x[50];
fprintf(x,&quot;dec-%d, hex \x%d&quot;,OneNumber,OneNumber);
do you see? you use the same OneNumber.
ostrstream xx;
xx<<&quot;dec value &quot;<<dec<<OneNumber<<endl<<&quot;hex value &quot;<<hex<<OneNumber<<flush; John Fill

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