Selection Sort

#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>

void SelectionSort(int ar[300], int n)
{
    int a, b, c, d, i, j, min;
    for (i = 0; i < n; i++)
    {
        min = ar[i];
        for (j = i + 1; j < n; j++)
        {
            if (ar[j] < min)
            {
                d = j;
                min = ar[j];
            }
        }
        ar[d] = ar[i];
        ar[i] = min;
    }
}

int main()
{
    int t, i = 0, j, k, l, a, b, c, d, x, y, z, n, ar[300];
    char str[100];

    freopen("numbers.txt", "r", stdin);
    for (; ;)
    {
        gets(str);
        if (feof(stdin)) break;
        ar[i++] = atoi(str);
    }

    SelectionSort(ar, i);
    for (l = 0; l < i; l++) printf("%d\n", ar[l]);

    return 0;
}