IGNOU CITL 1 2017 2018 - Write a C program using function to find whether a number is a sum of

Question

Write a C program using function to find whether a number is a sum of two prime numbers or not. A function need to be designed for finding a prime number.

13 Jan 2018

Answer :

Word Count : 820

Here's a C program that uses functions to determine whether a number is a sum of two prime numbers:

#include <stdio.h>

// Function to check if a number is prime
int isPrime(int num) {
if (num <= 1) {
return 0; // Not a prime number
}

for (int i = 2; i <= num / 2; i++) {
if (num % i == 0) {
return 0; // Not a prime number
}
}

return 1; // Prime number
}

// Function to find if a number is a sum of two prime numbers
int isSumOfPrimes(int num) {
for (int i = 2; i <= num / 2; i++) {
if (isPrime(i) && isPrime(num - i)) {
return 1; // Number is a sum of two

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