~ no response on stdout ~ in C [closed]

Answer 1

int main()
{
    int a, query, in, n, *b, *sum;
    scanf("%d",&query);

    sum = malloc(query * sizeof(int));

    /* do some checks if the malloc was successful */ 

    for(a = 0; a < query; a++)
    {
        scanf("%d",&in) ;    /* you should check if scan has returned 1 */
        b = malloc(in * sizeof(int)); /* and again check against any allocation errors */

        for(n = 0; n < in; n++)
        {
           b[n] = 1+7*(n)+6*(n)*(n-1)+(n)*(n-1)*(n-2);
           sum[a] = sum[a] + b[n];
        }
        free(b);
    }

    /* the rest */