anyone know C++?

Question

i'm trying to create a program that will tell whether a string of characters is a palindrome. how could i assign the characters so that the first letter will equal the last letter and the 2nd will equal the 2nd to last and so on? if anyone knows how and could provide an example, that would be awesome.

Answer 1

Hi,
Try the following
----------------------------------------------
#include
#include
#include

void main()
{
char *s,*r;
s="ABCD";
strcpy(s,r); // make a copy of the string
strrev(s); // reverse the stirng
if(strcmp(s,r)==0) //compare both the strings
printf("String is a palindrome.");
else
printf("String is not a palindrome.");
getch();
}
----------------------------------------------------------------

Answer 2

hi. about your question here's the logic
1.) get the input from user (String "input" for example)
2.) eliminated the spaces in the string otherwise even if its a palindrome, the system will compare a letter to a space
3.) to compare the first letter to the last letter you cud do this:
a.) declare another string then put the reversed "input" in that string (using for loop), then use "strcmp" get that?
b.) or use a for loop

for(int x=0; x {
if !(input[x]=second[input.length()-x])
break;
}


the logic is pretty much like that but i'm not sure if the syntax is correct since i programmed it directly to the "Your Answer" field... so bear with me.. :D

thanks!!! email me if you have questions!!!

Answer 3

something like this? (note: i am more of a java programmer, but i have gone into C++ a bit)

char stringchars[9999]; //just in case someone types a string
//19998 characters long...
for(int i=0;i stringchars[i]=yourstring[i];
}
bool isPalindrome=true;
int j=0;
for(int i=yourstring.length()-1;i>ceil(yourstring.length()/2);i--){
if(!stringchars[j++] == yourstring[i]){
isPalindrome=false;
break;
}
}
if(isPalindrome){
cout<

Didn't check it, but i *think* it works...(i haven't coded in c++ for a few months now)

Answer 4

Here is a link to a code snippet for palidromes.