FSFS

#include<stdio.h>
#include<malloc.h>
typedef struct process
{
    char p_name[2];
    int cpu_time,arrival_time,finish_time,turn_time,waiting_time,start_time;
}process;

int main()
{
    int no,i;
    float avg_turn_time=0,avg_waiting_time=0;
    process obj[7];
    printf("\nEnter no of processes:");
    scanf("\n%d",&no);

//Accepts input from user
    for(i=0;i<no;i++)
    {
        printf("\nEnter Process ID, Arrival Time and CPU time\n");
        scanf("%s%d%d",&obj[i].p_name,&obj[i].arrival_time,&obj[i].cpu_time);
    }
//first porocess time
    obj[0].start_time=1;
    obj[0].finish_time=obj[0].cpu_time;   
    obj[0].turn_time=obj[0].cpu_time;
    obj[0].waiting_time=0;
   
    avg_turn_time=obj[0].turn_time;
    avg_waiting_time=0;
//calculates time for each process

    for(i=1;i<no;i++)
    {   
        obj[i].start_time=obj[i-1].finish_time+1;
        obj[i].finish_time=obj[i-1].finish_time+obj[i].cpu_time;
        obj[i].turn_time=obj[i].finish_time-obj[i].arrival_time;
        obj[i].waiting_time=obj[i].turn_time-obj[i].cpu_time;
       
        avg_turn_time=avg_turn_time+obj[i].turn_time;
        avg_waiting_time=avg_waiting_time+obj[i].waiting_time;
    }

//Display all times

printf("\nP_ID\tArrival_Time   CPU_time     Start_Time   Finish_Time    Turn_Time     Waiting_Time\n");
    for(i=0;i<no;i++)
    {
printf("\n%s\t%d\t\t%d\t\t%d\t\t%d\t\t%d\t\t%d",obj[i].p_name,obj[i].arrival_time,obj[i].cpu_time,obj[i].start_time,obj[i].finish_time,obj[i].turn_time,obj[i].waiting_time);       
           
               
    }
    printf("\n");
    avg_turn_time=avg_turn_time/no;
    avg_waiting_time=avg_waiting_time/no;
   
    printf("\nAverage Turnaround Time=%f",avg_turn_time);
    printf("\nAverage Waiting Time=%f",avg_waiting_time);
    printf("\n");
   
}

//-------------------Output-------------------
/*


Enter no of processes:5

Enter Process ID, Arrival Time and CPU time
p1
0
6

Enter Process ID, Arrival Time and CPU time
p2
3
9

Enter Process ID, Arrival Time and CPU time
p3
5
2

Enter Process ID, Arrival Time and CPU time
p4
8
10

Enter Process ID, Arrival Time and CPU time
p5
11
6

P_ID    Arrival_Time   CPU_time     Start_Time   Finish_Time    Turn_Time     Waiting_Time

p1    0        6        1        6        6        0
p2    3        9        7        15        12        3
p3    5        2        16        17        12        10
p4    8        10        18        27        19        9
p5    11        6        28        33        22        16

Average Turnaround Time=14.200000
Average Waiting Time=7.600000

*/