Question

How to check whether a sentence is palindrome in C

Answer 1

#include <stdio.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>

bool isSentencePalindrome(const char* str) {
    // Convert the string to lowercase and remove non-alphanumeric characters
    char cleanedStr[1024];
    int j = 0;
    for (int i = 0; str[i]; i++) {
        if (isalnum(str[i])) {
            cleanedStr[j++] = tolower(str[i]);
        }
    }
    cleanedStr[j] = '\0';

    // Check if the cleaned string is a palindrome
    int len = strlen(cleanedStr);
    for (int i = 0; i < len / 2; i++) {
        if (cleanedStr[i] != cleanedStr[len - i - 1]) {
            return false;
        }
    }
    
    return true;
}

int main() {
    const char* sentence = "Top step's pup's pet spot.";
    
    printf("%s\n", isSentencePalindrome(sentence) ? "yes" : "no");
    
    return 0;
}

 
 
/*
run:
 
yes
 
*/

 

 

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