A C program to check whether the string is a palindrome or not, using pointers – IGNOU MCA Assignment 2013

MASTER OF COMPUTER APPLICATIONS
Course Code : MCS-011
Course Title : Problem Solving and Programming
Assignment Number : MCA(1)/011/Assign/13
Assignment 2013 

 An interactive C program to check whether the given string is a palindrome or not, using pointers.

#include<stdio.h>
void main()
{
    int MID,FLAG,I,LEN=0;
    char *PTR1,*PTR2,S[50];
    clrscr();
    printf("TO CHECK PALINDROME ENTER STRING : ");
    scanf("%s",&S);
     while(S[LEN]!=NULL)
    {
       LEN++;
    };
    printf("\nTHE STRING LENGTH IS : %d",LEN);
    ;
    PTR1=&S;
    PTR2=PTR1+(LEN-1);
    MID=(LEN/2)+1;
    for(I=0;I<MID;I++)
    {
    if(*PTR1==*PTR2)
        FLAG=0;
    else
        FLAG=1;
    LEN--;
    I++;
    }
    if(FLAG==0)
    printf("\nTHE STRING IS A PALINDROME");
    else
    printf("\nTHE STRING IS NOT A PALINDROME");
    getch();
}

CODE : –

[codesyntax lang=”c” lines=”normal”]

#include<stdio.h>
void main()
{
    int MID,FLAG,I,LEN=0;
    char *PTR1,*PTR2,S[50];
    clrscr();
    printf("TO CHECK PALINDROME ENTER STRING : ");
    scanf("%s",&S);
     while(S[LEN]!=NULL)
    {
       LEN++;
    };
    printf("\nTHE STRING LENGTH IS : %d",LEN);
    ;
    PTR1=&S;
    PTR2=PTR1+(LEN-1);
    MID=(LEN/2)+1;
    for(I=0;I<MID;I++)
    {
    if(*PTR1==*PTR2)
        FLAG=0;
    else
        FLAG=1;
    LEN--;
    I++;
    }
    if(FLAG==0)
    printf("\nTHE STRING IS A PALINDROME");
    else
    printf("\nTHE STRING IS NOT A PALINDROME");
    getch();
}

[/codesyntax]

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