# C++ program to Check Whether a Number can be Split into Sum of Two Prime Numbers

In the previous article, we have discussed C++ Program to Check Prime Number Using User-defined Function. In this article, we will see C++ program to Check Whether a Number can be Split into Sum of Two Prime Numbers.

## C++ program to Check Whether a Number can be Split into Sum of Two Prime Numbers

• How to split a number into two prime numbers.
• Write a C++ program to split a number in two prime numbers.

### C++ program to Check Whether a Number can be Express as Sum of Two Prime Numbers

#include<iostream>

using namespace std;

int isPrime(int num);

int main() {
int num, i;
cout << "Enter a positive number\n";
cin >> num;
for(i = 2; i <= num/2; i++){
if(isPrime(i)){
if(isPrime(num-i)){
cout << num << " = " << i << " + " << num-i;
return 0;
}
}
}

cout << "Not Possible";

return 0;
}

// returns 1 if num is prime number otherwise 0
int isPrime(int num){
int i;
// Check whether num is divisible by any
// number between 2 to (num/2)
for(i = 2; i <=(num/2); ++i) {
if(num%i==0) {
return 0;
}
}
return 1;
}

Output

Enter a positive number
24
24 = 5 + 19

Enter a positive number
27
Not Possible

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