HW1_bubble

#define _CRT_SECURE_NO_WARNINGS
#include <cstdio>
#include <cstdlib>
#include <assert.h>


int * std_in(int* n)
{
    scanf("%d", n);
    int * arr = (int *)malloc((*n) * sizeof(int));
    for (int i = 0; i < *n; ++i)
    {
        scanf("%d", &arr[i]);
    }
    return arr;
}

int * file_in(int* n)
{
    FILE *file = fopen("bubble_in.txt", "r");
    assert(file);
    fscanf(file, "%d", n);
    int * arr = (int *)malloc((*n) * sizeof(int));
    for (int i = 0; i < *n; ++i)
    {
        fscanf(file, "%d", &arr[i]);
    }
    fclose(file);
    return arr;
}

int * generate(int* n)
{
    (*n) = rand();
    int * arr = (int *)malloc((*n) * sizeof(int));
    for (int i = 0; i < *n; ++i)
    {
        arr[i] = rand();
    }
    return arr;
}

void bubble_sort(int *a, int n)
{
    int t = 0;
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < n - i - 1; ++j)
        {
            if (a[j] > a[j + 1])
            {
                t = a[j];
                a[j] = a[j + 1];
                a[j + 1] = t;
            }
        }
    }
}

void std_out(int *n, int *arr)
{
    for (int i = 0; i < *n; ++i)
        printf("%d ", arr[i]);
}

void file_out(int *n, int *arr)
{
    FILE *file = fopen("bubble_out.txt", "w");
    assert(file);
    for (int i = 0; i < *n; ++i)
        fprintf(file, "%d ", arr[i]);
    fclose(file);
}

int main()
{
    int n = 0;

    int* c = generate(&n);
    bubble_sort(c, n);
    std_out(&n, c);

    int* a = file_in(&n);
    bubble_sort(a, n);
    file_out(&n, a);

    int* b = std_in(&n);
    bubble_sort(b, n);
    std_out(&n, b);

    return 0;
}