POINTERS-9

• Problem Description

  
  Write a program to input 10 values in an array. Categorize each value as prime or composite using pointers.
  
  Input and Output Format:
  
  Refer sample input and output for formatting specification.
  
  All float values are displayed correct to 2 decimal places.
  
  All text in bold corresponds to input and the rest corresponds to output.
  

• CODING ARENA::

• #include <stdio.h>

  int isprime(int x)

  {

    int i,f=1;

    for(i=2;i<x;i++)

      if(x%i==0)

        f=0;

    return f;

  }

  int main()

  {

    int n;

    scanf("%d",&n);

    int i,a[n];

    for(i=0;i<n;i++)

      scanf("%d",&a[i]);

    for(i=0;i<n;i++)

    {

      if(isprime(a[i]))

         printf("%d is a prime number\n",a[i]);

      else

         printf("%d is a composite number\n",a[i]);

    }

    

  
  

  return 0;

  }

• Test Case 1

  
  Input (stdin)

  10
  
  3 4 5 6 7 8 9 10 11 12
  
  

  Expected Output

  3 is a prime number
  
  4 is a composite number
  
  5 is a prime number
  
  6 is a composite number
  
  7 is a prime number
  
  8 is a composite number
  
  9 is a composite number
  
  10 is a composite number
  
  11 is a prime number
  
  12 is a composite number

• Test Case 2

  
  Input (stdin)

  0
  
  

  Expected Output

  0