string editing

[t420h]

i am creating a program to see if a word is a palindrome, but i want it, when the word is read, to ignore the spaces and punctuation in the word/sentance. i am using apstring. how would i og about doing this.

for example, if i type "madam i'm adam", the program reads the spaces, and backwards it reads "mada m'i madam" which is wrong, i want it to ocmpletly ignore spaces. puct. thanks

tony

[SteveCRM]

find an ascii table, when going through your string to reverse it, add only valid ones(a-z & A-Z) to your string....to check you can use it as an integer

int test;
apstring myteststr;

test = myteststr[place]

if(test == ....

[SteveCRM]

find an ascii table, when going through your string to reverse it, add only valid ones(a-z & A-Z) to your string....to check you can use it as an integer

int test;
apstring myteststr;

test = myteststr[place]

if(test == ....

[SteveCRM]

find an ascii table, when going through your string to reverse it, add only valid ones(a-z & A-Z) to your string....to check you can use it as an integer

int test;
apstring myteststr;

test = myteststr[place]

if(test == ....

[jim mcnamara]

Just use a regular C function -

#include <ctype.h>
BOOL IsPalindrome(char *instr){  // return 1 = YES 0=NO
char tmp[100],tmp1[100];
char *buf,*s;
int i;
buf=tmp;
s=instr;
// remove punctuation & uppcase the result
while (*s!=0x00) {
   if(!ispunct(*s)) *buf++ = toupper(*s);
   s++;
   }
buf=0x00; // null terminate the string
_strrev(tmp1,tmp);  // reverse the string
return (strcmp((tmp1,tmp)==0);  // compare

}

[noble]

check the MSDN help in visual studio

type _strrev and look at the example....

the sample function given shows you...oddly an enough...
an example of how to test if a string is a palindrome

[CornedBee]

I recommend using isalpha and tolower to make a clean copy of the string, then reverse it using strrev and test with strcmp.

for(char* p = str, char* q = buf; *p != '\0'; p++, q++)
  if(isalpha(*p)) *q = tolower(*p);
*q = '\0';
// length of copy = q - buf