is_palindrome
#include <stdio.h>
#include <stdbool.h>
bool is_palindrome(int n ){
int rev = 0, orig = n;
while( n != 0){
rev = 10*rev + (n % 10);
n = n/10;
}
return orig == rev;
}
int main() {
printf("Enter a number");
int n = 0;
if( scanf("%d",&n)!=1 ){
prinf("Bad input\n");
}else{
if(is_palindrome(n))
printf("%d is a palindrome", n);
else
prinf("%d is not a palindrome", n);
}
return 0;
}is palindrom
#include <iostream>
#include <deque>
bool is_palindrome(const std::string &s){
if(s.size() == 1 ) return true;
std::deque<char> d ;
for(char i : s){
if(std::isalpha(i)){
d.emplace_back( toupper(i) );
}
}
auto front = d.begin();
auto back = d.rbegin();
while( (front != d.end()) || (back != d.rend())){
bool ans = (*front == *back);
if(!ans){
return ans;
}
++front;++back;
}
return true;
}
int main() {
std::string s = "A man, a plan, a cat, a ham, a yak, a yam, a hat, a canal-Panama!";
std::cout << std::boolalpha << is_palindrome(s) << std::endl;
return 0;
}Copyright © 2021 Codeinu
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