priority

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

int main()
{
    int no,i,total_cpu_time=0,j,processes,running;
    float avg_turn_time=0,avg_waiting_time=0;
    process obj[7],temp[7];
    process small;
    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, CPU time and Priority\n");
        scanf("%s%d%d%d",&obj[i].p_name,&obj[i].arrival_time,&obj[i].cpu_time,&obj[i].prior);
        total_cpu_time=total_cpu_time+obj[i].cpu_time;
    }
//Sort according to CPU time
    for(i=0;i<no;i++)
    {
        for(j=i+1;j<no;j++)
        {
            if(obj[i].prior>obj[j].prior)
            {   
                small=obj[i];
                obj[i]=obj[j];
                obj[j]=small;
            }
   
        }
    }

    for(i=0;i<no;i++)
    {
        printf("\n%d",obj[i].prior);   
    }

//First process 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].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("\n============================================================================================================");
printf("\nP_ID\tArrival_Time   CPU_time     Start_Time   Finish_Time    Turn_Time     Waiting_Time      Priority\n");
printf("==============================================================================================================\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\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,obj[i].prior);       
           
               
    }
    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-------------------//
/*
sainath@ubuntu: ./a.out

Enter no of processes:5

Enter Process ID, Arrival Time, CPU time and Priority
p1
0
14
2

Enter Process ID, Arrival Time, CPU time and Priority
p2
3
8
0

Enter Process ID, Arrival Time, CPU time and Priority
p3
5
5
1

Enter Process ID, Arrival Time, CPU time and Priority
p4
9
12
0

Enter Process ID, Arrival Time, CPU time and Priority
p5
16
6
2

0
0
1
2
2
============================================================================================================
P_ID    Arrival_Time   CPU_time     Start_Time   Finish_Time    Turn_Time     Waiting_Time      Priority
==============================================================================================================

p2    3        8        1        8        8        0        0
p4    9        12        9        20        20        8        0
p3    5        5        21        25        25        20        1
p1    0        14        26        39        39        25        2
p5    16        6        40        45        45        39        2

Average Turnaround Time=27.400000
Average Waiting Time=18.400000



*/