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49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/*
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* C program to read a string and check if it's a palindrome, without
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* using library functions. Display the result.
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*/
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#include <stdio.h>
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#include <string.h>
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void main()
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{
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char string[25], reverse_string[25] = {'\0'};
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int i, length = 0, flag = 0;
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fflush(stdin);
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printf("Enter a string \n");
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gets(string);
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/* keep going through each character of the string till its end */
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for (i = 0; string[i] != '\0'; i++)
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{
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length++;
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}
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for (i = length - 1; i >= 0; i--)
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{
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reverse_string[length - i - 1] = string[i];
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}
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/*
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* Compare the input string and its reverse. If both are equal
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* then the input string is palindrome.
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*/
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for (i = 0; i < length; i++)
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{
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if (reverse_string[i] == string[i])
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flag = 1;
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else
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flag = 0;
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}
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if (flag == 1)
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printf("%s is a palindrome \n", string);
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else
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printf("%s is not a palindrome \n", string);
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}
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/*
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*OUTPUT:
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Enter a string
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sanfoundry
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sanfoundry is not a palindrome
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Enter a string
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malayalam
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malayalam is a palindrome
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*/ |