Write a C program using user-defined functions to determine whether the given string is palindrome or not

In this article, we will write a C program using user-defined functions to determine whether the given string is palindrome or not.

Palindrome means the string on reversal should be the same as the original.

Example: madam on reversal is also madam

Algorithm: 

Step 1: start 

Step 2: read a string A 

Step 3: copy string A into B 

Step 4: reverse string B 

Step 5: compare A &B If A equals B to got step 6 Else goto step 7 

Step 6:print given string A is palindrome Step 7:print g

Write a C program using user-defined functions to determine whether the given string is palindrome or not

#include <stdio.h> #include <string.h> void main() {	char string[25], reverse_string[25] = { '\0' };	int i, length = 0, flag = 0;	printf("Enter a string \n");	gets(string);	for (i = 0; string[i] != '\0'; i++)	{	length++;	}	printf("The length of the string '%s' = %d\n", string, length);	for (i = length - 1; i >= 0; i--)	{	reverse_string[length - i - 1] = string[i];	}	for (flag = 1, i = 0; i < length; i++)	{	if (reverse_string[i] != string[i])	flag = 0;	}	if (flag == 1)	printf("%s is a palindrome \n", string);	else	printf("%s is not a palindrome \n", string); }

Input:

Enter a string madam

Output:

The length of the string 'madam' = 5 madam is a palindrome

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