selectiverp.c

#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
int input(int a[], int frame_size)
{
    printf("\n\n Input \n\n");
    for (int i = 1; i <= frame_size; i++)
    {
        printf(" Enter Value For Frame[%d] : ", i);
        scanf("%d", &a[i]);
        printf("\n");
    }
    printf("\n\n");
    return 1;
}
int display(int a[], int frame_size)
{
    printf("\n\n Display \n\n");
    for (int i = 1; i <= frame_size; i++)
    {
        printf(" Frame[%d] : %d ", i, a[i]);
        printf("\n");
    }
    printf("\n\n");
    return 1;
}
int selective_repeat(int frames[], int window_size, int frame_size)
{
    int nt = 0;
    int k = 0;
    int left[10000] = {-1};
    int i;
    for (i = 1; i <= frame_size; i++)
    {
        int flag = rand() % 2;
        if (flag)
        {
            printf(" Frame[%d] with value %d Acknowledged !!! \n\n", i,
                   frames[i]);
            nt++;
        }
        else
        {
            printf(" Frame[%d] with value %d Not Acknowledged !!! \n\n", i,
                   frames[i]);
            left[k++] = frames[i];
            nt++;
        }
        if (i % window_size == 0)
        {
            for (int x = 0; x < k; x++)
            {
                printf(" Frame[%d] with value %d Retransmitted \n\n", x,
                       left[x]);
                nt++;
                printf(" Frame[%d] with value %d Acknowledged on Second Attempt \n\n", x, left[x]);
            }
            k = 0;
        }
    }
    for (i = 0; i < k; i++)
    {
        printf(" Frame[%d] with value %d Retransmitted \n\n", i, left[i]);
        nt++;
        printf(" Frame[%d] with value %d Acknowledged on Second Attempt \n\n", i, left[i]);
    }
    printf(" Total Transmissions : %d \n\n", nt);
    return 0;
}
int main()
{
    int frames[50];
    int window_size;
    int frame_size;
    printf("\n\n Selective Repeat \n\n");
    printf(" Enter Window Size : ");
    scanf("%d", &window_size);
    printf(" Enter Number Of Frames To Be Transmitted : ");
    scanf("%d", &frame_size);
    input(frames, frame_size);
    display(frames, frame_size);
    selective_repeat(frames, window_size, frame_size);
    return 0;
}