Question

printt return 0; 4. Write the programs. (20 marks) ) Write a function prime() 2) rime) that returns1 if its argument is a prime number and returns 0 rogram that reads a number from standard input and calls the function to test whether it is a prime number or not. rogram that will find, search and replace text strings. The program reads a text from t until end of line. The program will then prompt for a phrase to be searched for in the text and a phrase to replace the found phrase with. The replacement phrase can be shoter longer than the searched for phrase. Show the updated initial line of text on the display Example: initial text is: This is my first line in my first text Search for "first" and replace with "Eorever best" Output: This is my forever best line in my forever best text

Answer 1

Answer 4)

1.

#include<stdio.h>

//Function to check if n is prime or not
int prime(int n)
{
   if(n == 1)
       return 0;//1 is not prime
   if(n == 2)
       return 0;//2 is the only even prime  
   for(int i = 2; i <= n/2; i++)
       if(n % i == 0)//If n get divided by any other number then it is not prime
           return 0;
   return 1;
}

int main()
{
   int n;
   scanf("%d", &n);//Read number from standard input
   if(prime(n))//If prime(n) returns 1
       printf("%d is prime", n);
   else
       printf("%d is NOT prime", n);
   return 0;
}

OUTPUT: