Char to Binary (ASCII to Bin)

Code:

---

unsigned char *CharToBit (char pValue){

        unsigned char *cByte;
        unsigned int iCharASCII, iBit = 0;
        int iCont;
       
        iCharASCII = pValue;
       
        for (iCont=7; iCont>=0; iCont--){
                iBit = iCharASCII % 2;
                iCharASCII = iCharASCII / 2;
               
                if (iBit == 1){
                        cByte [iCont] = '1';
                }
                else { cByte [iCont] = '0'; }
        }
        cByte [8] = '\0';
       
        return cByte;
}

..........

cFlag = substr (cStatus, 1,1);
cFuncRes = cFlag [0];        // + '\0';
cFlag = CharToBit (cFuncRes);

---

This code generate an exception with unknow code.
is There an specific function to convert a Char ASCII to Binary ?

Do you think you have the storage for the 8 binary characters?

Yes, I Need Manipulate the binary as 8 char variable.

No, you haven't allocated storage for the 8 binary characters and that's why the exception.
If you just want to display how an int looks in 1s and 0s consider a recursive function.

Quote:

---

Originally Posted by itCbitC

If you just want to display how an int looks in 1s and 0s consider a recursive function.

---

Nah, iteration is fine.

Please note that CharToBit is returning a pointer to char! So how have you declared/initialized cFlag?

The function, itself, appears to looks sound.

Quote:

---

Originally Posted by laserlight

Nah, iteration is fine.

---

cool beans
:cool:

Code:

---

char *substr(const char *pstr, int start, int numchars)
{
        char *pnew = malloc(numchars+1);
       
        strncpy(pnew, pstr + start, numchars);
        pnew[numchars] = '\0';
        return pnew;
}

---

Because strsub return a unsigned char *;

Do you Know someone function to Convert Int to Binary as Char ?

Quote:

---

Originally Posted by sergioms

Do you Know someone function to Convert Int to Binary as Char ?

---

Basically, given a char, you wish to store its binary representation in a null terminated string?

The main problem at this point is that this string is just a pointer that points to garbage. It looks like you want to use dynamic memory allocation with malloc() to create an array of 9 chars, and then fill the first 8 chars with the binary representation of the input char, and then terminate the string with a null character. Alternatively, you can avoid unnecessary dynamic memory allocation by having the caller pass a long enough string to the function.

Quote:

---

[...]Alternatively, you can avoid unnecessary dynamic memory allocation by having the caller pass a long enough string to the function.

---

and if the program is not multithreaded, a static 9 byte array, handled by the function, seems reasonable too.

Ok, thank's for all.

I has used itoa function:

itoa (number, string, 2);