F: malloc

[Konstantin8105]

test

struct MyNums {
    char name[100];
    int size;
    int numbers[];
};
void test_array_struct()
{
    int n = 10, k;
    struct MyNums *pnt;
    pnt = malloc(sizeof(struct MyNums) + n * sizeof(int));
    strcpy(pnt->name, "Натуральные числа");
    pnt->size = n;
    for (k = 0; k < pnt->size; k++)
        pnt->numbers[k] = k + 1;
	is_eq(pnt->numbers[2],3);
	is_eq(pnt->numbers[5],6);
}

[Konstantin8105]

void test_pointer_malloc1() {
    int m = 3, n = 5;
    int *p;
    p = malloc(m * n * sizeof(int));
    int i, j, count = 0;
    for (i = 0; i < m; i++) {
        for (j = 0; j < n; j++) {
            count++;
            p[i+j*m] = count;
        }
    }
	is_eq(p[0], 1);
	is_eq(p[2+2*m], 13);
    free(p);
}

void test_pointer_malloc2() {
    int m = 3, n = 5;
    int (*p)[n];
    p = malloc(m * n * sizeof(int));
    int i, j, count = 0;
    for (i = 0; i < m; i++) {
        for (j = 0; j < n; j++) {
            count++;
            p[i][j] = count;
        }
    }
	is_eq(p[0][0], 1);
	is_eq(p[2][2], 13);
    free(p);
}

void test_pointer_malloc3() {
    int m = 3;
    int (*p)[5];
    p = malloc(m * 5 * sizeof(int));
    int i, j, count = 0;
    for (i = 0; i < m; i++) {
        for (j = 0; j < 5; j++) {
            count++;
            p[i][j] = count;
        }
    }
	is_eq(p[0][0], 1);
	is_eq(p[2][2], 13);
    free(p);
}