converting char to unsigned int

[thepersonof]

Hi I found that char could be converted to an interger as follows: char c = 250; int a = int(c) How can I get the a value of a to be the same as what I put in? It sometimes comes out negative, although I can add 256. There is a simpler way? thank you

[Nibu babu thomas]

thepersonof wrote:

char c = 250;

thepersonof wrote:

How can I get the a value of a to be the same as what I put in? It sometimes comes out negative, although I can add 256. There is a simpler way?

unsigned char c = 250; Signed char limit is 127.

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Nibu thomas Software Developer

[stefanmihaimoga]

thepersonof wrote:

How can I get the a value of a to be the same as what I put in? It sometimes comes out negative, although I can add 256. There is a simpler way?

char c = 250; int a = (int)(unsigned int)c;

[color Aljechin]

thepersonof wrote:

char c = 250; int a = int(c)

char c = 250; unsigned int a = (int)c; ??

[kakan]

Make c an unsigned char. (Yes, there are such a thing as signed and unsigned chars in C). Or cast c to an unsigned char. So: 1. unsigned char c = 250; Or: 2. int a = (int) (unsigned char) c; Or both... -- modified at 7:49 Thursday 6th April, 2006 OR: int a = 250; :laugh:

[Aqueel]

do you want the value of a to be 250 in this case? We Believe in Excellence www.aqueelmirza.cjb.net

[thepersonof]

Thankyou ... converted to an unsigned char and it works great

[Wim Engberts]

union { char c[sizeof (int)]; int n; } Convert; char c = 250; Convert.n = 0; Convert.c[0] = c; Then, in Convert.n you will get the proper value. Good luck! William

[Aqueel]

Yah i misunderstood. They are right. We Believe in Excellence www.aqueelmirza.cjb.net

[Cedric Moonen]

Geez :omg: That's a really complicated way of doing that !

[Aqueel]

Chaa gia hai bhai! We Believe in Excellence www.aqueelmirza.cjb.net

[thatsme_cool]

Kya cha gaya hai Yar

[Aqueel]

hahahaha What a solution yaar! Nice Unique and innovative :-D We Believe in Excellence www.aqueelmirza.cjb.net

[toxcct]

...and you said what ? :confused:

[Aqueel]

i said "Chaa gia hai bhai" which means "Great job! brother!". This is Urdu language idiom. It is used for a person who does something great. :) We Believe in Excellence www.aqueelmirza.cjb.net

[David Crow]

thepersonof wrote:

int a = int(c)

A cast is actually not necessary. You could accomplish the same with:

int a = c;

because a char gets internally promoted to an int during such operations. A char can hold values in the range -128 to 127, whereas an unsigned char can hold values in the range 0 to 255.

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"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

[abbiyr]

Hi there. As the other replies have stated, you need to use the unsigned char for values above 127. To perform explicit conversions in C++, you should use the static_cast instead of the old C-Style casts. unsigned char c = 250; int a = static_cast<int>(c); Cheers

[David Crow]

abbiyr wrote:

To perform explicit conversions in C++, you should use the static_cast instead of the old C-Style casts.

For integral types, this is not necessary.

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"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

[abbiyr]

Quite agree. It is not necessary, the unsigned char will be cast correctly without it. I recommended it though, as it does explicity show the intentions of the developer.