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#include<iostream.h>
#include<conio.h>
#include<stdio.h>
 
int main()
{   void palcheck(char str[]);   
    char ans;
    char str[20];
    do
    {
 
     cout<<"Enter the string to check if it is a palindrome. ";
     gets(str);
     palcheck(str);
     cout<<"\nEnter Y to continue. ";
     cin>>ans;
    }while (ans=='y'||ans=='Y');  
 
 
}
void palcheck(char str[])
{    int l=0,k=0,flag;
     for(int i=0;str[i]!='\0';i++)
    l=l+1;
    k=l;
    for(int j=0;j<l/2;j++)
    {
            k--;
            if(str[j]==str[k])
            flag=1;
            else
            {flag=0;
            break;}
    }
    if(flag==0)
    cout<<"\nString is not a palindrome. ";
    else cout<<"String is a palindrome. ";
}

#include<iostream.h> #include<conio.h> #include<stdio.h> int main() { void palcheck(char str[]); char ans; char str[20]; do { cout<<"Enter the string to check if it is a palindrome. "; gets(str); palcheck(str); cout<<"\nEnter Y to continue. "; cin>>ans; }while (ans=='y'||ans=='Y'); } void palcheck(char str[]) { int l=0,k=0,flag; for(int i=0;str[i]!='\0';i++) l=l+1; k=l; for(int j=0;j<l/2;j++) { k--; if(str[j]==str[k]) flag=1; else {flag=0; break;} } if(flag==0) cout<<"\nString is not a palindrome. "; else cout<<"String is a palindrome. "; }

i am almost done . just a small error. it is not asking for new input which i want it to do . it is storing the previous value. some problem around the do loop but not able to figure out. i think it has to do something with declaration of variable.

void palcheck(char str[]);
needs to be written before main, not inside of it.