BITs: string to int

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refl

how to convert a string having "011" to int ? (and viceversa) Thanks C#
please!
sample "011" I want a three on the int. "111" = 7
can i have logic on bits from an integer where bit 0 and bit 2 from the
int number are on;like
int[0] & int[2] == true
 
refl said:
how to convert a string having "011" to int ? (and viceversa) Thanks C#
please!
sample "011" I want a three on the int. "111" = 7
can i have logic on bits from an integer where bit 0 and bit 2 from the
int number are on;like
int[0] & int[2] == true
Click to expand...

Look at Convert.ToInt16(string value, int base).
 
that works , thanks

how to do the logic on two int

intA = 3 (0011)
intB = 2 (0010)

need to find out what bit is on in both integers on certain bit position

like I would like to ask: do both integers have bit 1 on ?

thanks


Family Tree Mike said:
refl said:
how to convert a string having "011" to int ? (and viceversa) Thanks C#
please!
sample "011" I want a three on the int. "111" = 7
can i have logic on bits from an integer where bit 0 and bit 2 from the
int number are on;like
int[0] & int[2] == true
Click to expand...

Look at Convert.ToInt16(string value, int base).
Click to expand...
 
* refl wrote, On 5-10-2009 22:01:
that works , thanks

how to do the logic on two int

intA = 3 (0011)
intB = 2 (0010)

need to find out what bit is on in both integers on certain bit position

like I would like to ask: do both integers have bit 1 on ?
Click to expand...


bool twoInBoth = 3 ^ 2 == 2

should do
thanks


Family Tree Mike said:
refl said:
how to convert a string having "011" to int ? (and viceversa) Thanks C#
please!
sample "011" I want a three on the int. "111" = 7
can i have logic on bits from an integer where bit 0 and bit 2 from the
int number are on;like
int[0]& int[2] == true
Click to expand...

Look at Convert.ToInt16(string value, int base).
Click to expand...
Click to expand...
 
* refl wrote, On 5-10-2009 22:01:

bool twoInBoth = 3 ^ 2 == 2

should do
Click to expand...

Uh. Either you or I are misunderstanding the question.

If you want to know if a particular bit is set in _both_ integers, you
want the & (and) operator, not ^ (xor). 3 ^ 2 == 1, not 2.

Even there, one would also need to & the result with the integer
representing the bit in question:

int a = 7;
int b = 2;
int bit = 1;
int bitMask = 1 << bit;

bool f;

f = (a & b) == bitMask; // false
f = (a & b & bitMask) == bitMask; //true

Pete
 
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