Question

How to check if string is palindrome in C

Answer 1

#include <stdio.h> 
#include <string.h> 
  
int main(int argc, char **argv) 
{ 
    char s[6] = "abcba", rev[6] = "";
    int j = 0;
     
    for(int i = strlen(s) - 1; i >= 0; i--, j++)
        rev[j] = s[i];
         
    rev[j] = '\0';
       
    if (strcmp(rev, s) == 0)
        printf("Palindrome\n");
    else
        printf("Not Palindrome");
     
    return(0);
}
  
   
/*
   
run:
   
Palindrome
  
*/

 

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Answer 2

#include <stdio.h> 
#include <string.h> 
 
int main(int argc, char **argv) 
{ 
    char s[6] = "abcba", rev[6] = "abcba";
    
    strcpy(rev, s);
    strrev(rev);
      
    if (strcmp(rev, s) == 0)
        printf("Palindrome\n");
    else
        printf("Not Palindrome");
    
    return(0);
}
 
  
/*
  
run:
  
Palindrome
 
*/

 

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