i wrote this program to find prime numbers, but whenever i run it, i get an error.

This is the code [c++]:

int main(void)

{

int num=0;

int i=0;

cout<<"num";

cin>>num;

while(i<num)

{

num=num%i;

i++;

}

if(num==0)

cout<<"not prime";

else

cout<<"prime";

return 0;

}

My real task is to get the user to input a number greater than 2, and then print out what prime numbers added together would make up the number the user inputed. For example:

4 = 2 + 2

6 = 3 + 3

8 = 3 + 5

10 = 3 + 7 etc.

i need to create a function: void Goldbach(int n, int& p1, int & p2)

and the main program would be:

void main()

{

int num, prime1, prime2;

cout<<"Enter an even positive integer greater than 2:";

cin>>num;

Goldbach(num,prime1,prime2);

cout<<num<<" = "<<prime1<<" + "<<prime2<<endl;

}

//my first step is to determine what 2 prime numbers would add up to get the //number the user inputs.

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