can anyone help me pls :(

[buddhika19]

1. What is the binary equivalent of the signed integer -19?

2. What is the unsigned integer which corresponds to the hexadecimal E8?

3. What is the IEEE 754 representation of the signed decimal number -12.25?

can anyone help aobut these 3 questions pls

 

[DJANURADHA@mp3]

ops bump

 

[sadeeep]

bumpz

 

[methsri]

(1)
0001 0011 =19

1110 1100 = 2's compliment

Then add 1

answer
1110 1101 = -19

 

[methsri]

Not sure abt da 2nd Quection , easiest way is to run da following programme and see da output


#include "stdafx.h"

#include <tchar.h>

#include <malloc.h>


int _httoi(const TCHAR *value)
{
struct CHexMap
{
TCHAR chr;
int value;
};
const int HexMapL = 16;
CHexMap HexMap[HexMapL] =
{
{'0', 0}, {'1', 1},
{'2', 2}, {'3', 3},
{'4', 4}, {'5', 5},
{'6', 6}, {'7', 7},
{'8', 8}, {'9', 9},
{'A', 10}, {'B', 11},
{'C', 12}, {'D', 13},
{'E', 14}, {'F', 15}
};
TCHAR *mstr = _tcsupr(_tcsdup(value));
TCHAR *s = mstr;
int result = 0;
if (*s == '0' && *(s + 1) == 'X') s += 2;
bool firsttime = true;
while (*s != '\0')
{
bool found = false;
for (int i = 0; i < HexMapL; i++)
{
if (*s == HexMap.chr)
{
if (!firsttime) result <<= 4;
result |= HexMap.value;
found = true;
break;
}
}
if (!found) break;
s++;
firsttime = false;
}
free(mstr);
return result;
}

int main(int argc, char* argv[])
{
TCHAR *test[4] = {_T("0xFFFF"), _T("0xabcd"), _T("ffff"), _T("ABCD")};
for (int i = 0; i < 4; i++)
_tprintf(_T("Hex String: %s is int: %d\n\r"), test, _httoi(test));
return 0;
}

 

[methsri]

(3)
Binary representation of -12.25 = 11000001010001000000000000000000

(IEEE 754 floating point)

 

[buddhika19]

thnx mate..........

 

[buddhika19]

What is the signed integer equivalent of the binary 10101010?

 

[maduranga_it]

Not sure abt da 2nd Quection , easiest way is to run da following programme and see da output


#include "stdafx.h"

#include <tchar.h>

#include <malloc.h>


int _httoi(const TCHAR *value)
{
struct CHexMap
{
TCHAR chr;
int value;
};
const int HexMapL = 16;
CHexMap HexMap[HexMapL] =
{
{'0', 0}, {'1', 1},
{'2', 2}, {'3', 3},
{'4', 4}, {'5', 5},
{'6', 6}, {'7', 7},
{'8', 8}, {'9', 9},
{'A', 10}, {'B', 11},
{'C', 12}, {'D', 13},
{'E', 14}, {'F', 15}
};
TCHAR *mstr = _tcsupr(_tcsdup(value));
TCHAR *s = mstr;
int result = 0;
if (*s == '0' && *(s + 1) == 'X') s += 2;
bool firsttime = true;
while (*s != '\0')
{
bool found = false;
for (int i = 0; i < HexMapL; i++)
{
if (*s == HexMap.chr)
{
if (!firsttime) result <<= 4;
result |= HexMap.value;
found = true;
break;
}
}
if (!found) break;
s++;
firsttime = false;
}
free(mstr);
return result;
}

int main(int argc, char* argv[])
{
TCHAR *test[4] = {_T("0xFFFF"), _T("0xabcd"), _T("ffff"), _T("ABCD")};
for (int i = 0; i < 4; i++)
_tprintf(_T("Hex String: %s is int: %d\n\r"), test, _httoi(test));
return 0;
}

wow