Thread: Delete element of array

Hello!
I have an assignment in school to find prime numbers.
In my function i'm supposed to find the prime numbers and delete the numbers that are not a prime.
The application is not complete so don't worry about my return value etc.

I have looked up how other people have done their deletion of an element but I cannot seem to get it to work.

Any help would be nice, thank you!

Code:

int checkForPrime(int* a, int num){ 
   int c = 0, j = 0;


    for(int i = 0; i < num; i++){
            for (j = 2; j <= (*a+i)/2; j++){
                if(((*a+i) % j) == 0)
                    break;
            }
            if(*(a+i) > 1 && !(j<= (*a+i)/2)){
                c++;
                //printf("yes");
            }
            else{
                //I want to delete the number that comes here,
                //Will always know that *(a+i) is the correct number to delete.
                }
                printf("%d ", *(a+i));
    }


    return c;
}


int main()
{
    int number[100];
    int counter;
    int result;


    printf("Numbers to check: ");
    scanf("%d", &counter);
   // number = (int*)malloc(num*sizeof(int));




    for(int i = 0; i < counter; i++){
        printf("number %d: ",i+1);
        scanf("%d", number+i);


    }


    result = checkForPrime(number, counter);


    //printf("%d", result);


    return 0;
}