Question

I have the following code:

str = "ABCD";  //0x001135F8  
newStr = "EFGH"; //0x008F5740

*str after realloc at 5th position – //0x001135FC
I want it to point to: 0x008F5740

void str_cat(char** str, char* newStr)
{
 int i;
 realloc(*str, strlen(*str) + strlen(newStr) + 1); //*str is now 9 length long
 // I want to change the memory reference value of the 5th char in *str to point to newStr.
 // Is this possible?
 // &((*str) + strlen(*str)) = (char*)&newStr; //This is my problem (I think)
}

Answer 1

void str_cat( char* dest, char* src )
{
   dest = realloc( dest, strlen( dest ) + strlen( src ) + 1 );

   strcpy( dest + strlen(dest), src );
}

should work – although I do not have a compiler at hand to test

or even faster and almost no pointers: http://www.koders.com/c/fid359660C181A42919DCB9E92C1406B7D16F27BB8D.aspx