C语言,输入一个整数n再输入n个整数,输出其中所有偶数

int i, a, n;int * pl = NULL;printf("input n:");scanf("%d", &n);if (n > 0){ pl = (int *)malloc(n*sizeof(int));}for (i = 0; i < n; i++){ printf("input number %d:", i); scanf("%d", &a); pl[i] = a;} printf("\neven number:");for (i = 0; i < n; i++){ a = pl[i]; if (a%2 == 0) { printf(" ", a); }}if (pl != NULL){ free(pl); pl = NULL;}