Reverse a string

[Sinjanv]

How to write a c program tat takes the string as input and convert it into bits and reverse the string

[code green]

Treat the string as an array. Get the size (length)

Should be possible in one loop incrementing upto size,
and within the loop decrement a count down from size.

With both these values copy array into new string array.
Roughly

back = size;
for(c=0;c<size;c++)
{
    newStr[c] = strArray[size];
    back --;
}

[Dheeraj Joshi]

Small correction

newStr[c] = strArray[back];
back--;

Regards
Dheeraj Joshi

[Sinjanv]

How to write a c program tat takes the string as input and convert it into bits and reverse the string

but how to convert the string into bits first

[jkmyoung]

bits and not bytes?
You can do what they're doing for the first part, but then reverse each character's bits.
pseudo:

get value c
set newValue = 0
shifts = size of c in bits. 
while (shifts > 0){
  if c & 1  == 1
    newValue++;
  c >>= 1;
  if (shifts > 1)
    newValue <<= 1;
  shifts --;
}

then use newValue.

[donbock]

What exactly do you mean by "convert the string to bits"? Please provide an example of an input string and the output you want.

[Sinjanv]

What exactly do you mean by "convert the string to bits"? Please provide an example of an input string and the output you want.

example an input string consists of sinjanv and the last letter v in the string is a character this needs to be converted into bits and reverse the bits such tat it output give a new character

[donbock]

OK, the input string is "sinjanv". You called it a string, so it has to be null-terminated. What is the expected output string? Please be specific, otherwise I'm forced to guess what you mean by "reverse the bits".

[whodgson]

The way I understand it this function prints the string in reverse order by accessing each character in memory in the reverse order of its assignment.

void reverse ()
{ char c;
cin.get(c);
if(c=='\n')return;
reverse();
cout<<c;
return;
}

[donbock]

If the OP wants to reverse the chars in a string then:
"abcd" becomes "dcba"

If the OP wants to reverse the bits in a string then ... it depends what he means by that.
"abcd" is the same as {0x61, 0x62, 0x63, 0x64, 0x00} for ASCII encoding.
does "abcd" become {0x86, 0x46, 0xC6, 0x26, 0x00}
or does "abcd" become {0x26, 0xC6, 0x46, 0x86, 0x00}
or does "abcd" become {0x00, 0x26, 0xC6, 0x46, 0x86}

I hesitate to offer detailed advice until I'm sure what the OP wants to do.

[whodgson]

Yes...see what you mean.

[Sinjanv]

If the OP wants to reverse the chars in a string then:
"abcd" becomes "dcba"

If the OP wants to reverse the bits in a string then ... it depends what he means by that.
"abcd" is the same as {0x61, 0x62, 0x63, 0x64, 0x00} for ASCII encoding.
does "abcd" become {0x86, 0x46, 0xC6, 0x26, 0x00}
or does "abcd" become {0x26, 0xC6, 0x46, 0x86, 0x00}
or does "abcd" become {0x00, 0x26, 0xC6, 0x46, 0x86}

I hesitate to offer detailed advice until I'm sure what the OP wants to do.

THE abcd becomes {0x61, 0x62, 0x63, 0x64, 0x00} since the given is in hexadecimal form i need to convert into binary in C one character= 8bits so the 8bits are reversed so that it becomes a new character

[donbock]

THE abcd becomes {0x61, 0x62, 0x63, 0x64, 0x00} since the given is in hexadecimal form i need to convert into binary in C one character= 8bits so the 8bits are reversed so that it becomes a new character

Please stop making me guess.
If "abcd" is the same as {0x61, 0x62, 0x63, 0x64, 0x00} then what is the expected output after that string goes into your program?