Can you help me with this? Solve it in C

Question

Write a program that
finds the number of prime palindromic numbers between two given numbers: m and n.
For example: If m and n are given : 10000 12000 Then the prime palindromic numbers are: 10301 10501
10601 11311 11411.

Answer 1

eerv Hello, 😊
Did you manage to do the assignment, are my instructions helps you?
Do you need more help to work on?

Answer 2

eerv I see, you did not finishing the functions lesson (C tutorial)!

For surely, there are even better and simpler solutions for this task.

I did it using two functions to check whether the number is prime and palindrome:
https://code.sololearn.com/c66d6Ub1SSg0/?ref=app

Answer 3

eerv
To solve this problem, you can make two functions:

#1st for checking whether the number is prime or not;

#2nd for checking whether the number is palindrome or not.

• Checking for palindrome,
An integer is said to be a palindrome if it is equal to its reverse. For example, 79197 and 324423 are palindromes.

int palindrome(int num){
  int rev = 0;
  int temp = num;

  while (num > 0){
    rev = rev * 10;
    rev = rev + num%10;
    num = num / 10;
  }

  if (temp == num)
    return 1;
  else
    return 0;
}

• After getting reverse, we will check whether original and reverse of it are same or not.

• If both are same return 1,
otherwise return 0.

Answer 4

eerv You are welcome! 😊
Have a nice coding! ;)👍

Answer 5

Hello, 😊
Please, if you want us to help you, then show us your attempt, what you don't understand exactly, where you are struggling, it will be much easier!👍😉

Use the search bar!
https://www.sololearn.com/post/10362/?ref=app
Please, read our guidelines:
https://www.sololearn.com/discuss/1316935/?ref=app
An useful code for any new user here! ;)
https://code.sololearn.com/WvG0MJq2dQ6y/

Answer 6

eerv Ok,
I will help you with textual algorithm!👍

Answer 7

i can do the prime number part but dont know how to do show the palindromic numbers

Answer 8

thank you

Answer 9

Danijel Ivanović thank you for your help. I'll check it as soon as i'm available.

Answer 10

there is something wrong with this
#include <stdio.h>
#include <stdlib.h>
int prime_num(int x){
int n;
scanf("%d",&n);
for(x=2;x<=n-1;x++){
if(n%x==0){
return 0;
break;
}
}
if(x==n)
return 1;

}
int palindrome_num(int y){
int num, reverse_num=0, temporary_num;
scanf("%d",&num);
temporary_num=num;
while(temporary_num!=0){
reverse_num=reverse_num*10;
reverse_num=reverse_num+temporary_num%10;
temporary_num=temporary_num/10;
}
if(num==reverse_num)
return 1;
else
return 0;

}
int main()
{
int a, b, i, j=0;
scanf("%d %d",&a,&b);
for (i=a; i<=b; i++)
{
if (palindrome_num(i)&&prime_num(i))
j++;
}
printf("%d",j);
return 0;
}