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// SJF scheduling program in c
#include<string.h>
int main()
{
    int bt[20],at[10],n,i,j,temp,st[10],ft[10],wt[10],ta[10];
    int totwt=0,totta=0;
    double awt,ata;
    char pn[10][10],t[10];
    //clrscr();
    printf("Enter the number of process:");
    scanf("%d",&n);
    for(i=0; i<n; i++)
    {
        printf("Enter process name, arrival time& burst time:");
        scanf("%s%d%d",pn[i],&at[i],&bt[i]);
    }
    for(i=0; i<n; i++)
        for(j=0; j<n; j++)
        {
            if(bt[i]<bt[j])
            {
                temp=at[i];
                at[i]=at[j];
                at[j]=temp;
                temp=bt[i];
                bt[i]=bt[j];
                bt[j]=temp;
                strcpy(t,pn[i]);
                strcpy(pn[i],pn[j]);
                strcpy(pn[j],t);
            }
        }
    for(i=0; i<n; i++)
    {
        if(i==0)
            st[i]=at[i];
        else
            st[i]=ft[i-1];
        wt[i]=st[i]-at[i];
        ft[i]=st[i]+bt[i];
        ta[i]=ft[i]-at[i];
        totwt+=wt[i];
        totta+=ta[i];
    }
    awt=(double)totwt/n;
    ata=(double)totta/n;
    printf("\nProcessname\tarrivaltime\tbursttime\twaitingtime\tturnaroundtime");
    for(i=0; i<n; i++)
    {
        printf("\n%s\t%5d\t\t%5d\t\t%5d\t\t%5d",pn[i],at[i],bt[i],wt[i],ta[i]);
    }
    printf("\nAverage waiting time: %f",awt);
    printf("\nAverage turnaroundtime: %f",ata);
    return 0;
}