fcfs scheduling

fcfs.c
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ADITHYA ANIL B.Tech CSE A 2017 - 2021
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fcfs.c
#include<stdio.h>
int main()
{
	int n,p[10], bt[20], wt[20], ct[20], tat[20], at[20],c=0,tot=0,temp,i, j;
	float avgwt=0, avgtat=0;
	printf("Enter the number of processes:");
	scanf("%d", &n);
	printf("Enter the burst time for each process:");
	for(i=0;i<n;i++)
	{	printf("p[%d]",i+1);
		p[i]=i+1;
		scanf("%d", &bt[i]);
	}
	printf("Enter the arrival time for each process:");
	for(i=0;i<n;i++)
	{	printf("p[%d]",i+1);
		p[i]=i+1;
		scanf("%d", &at[i]);
	}
for(i=0; i<n; i++) {
        for(j=0; j<n; j++) {
            if(at[i]< at[j]) 
		{
                temp = p[j];
                p[j] = p[i];
                p[i] = temp;
		temp = at[j];
                at[j] = at[i];
                at[i] = temp;
		temp = bt[j];
                bt[j] = bt[i];
                bt[i] = temp;
            }
        }
    }

	
	
	
	c=at[0];
	for(i=0;i<n;i++)
		{c=c+bt[i];
		ct[i]=c;
		}
	for(i=0;i<n;i++)
		{tat[i]=ct[i]-at[i];
		tot+=tat[i];
		}
	avgtat=(float)tot/n;
	tot=0;
	for(i=0;i<n;i++)
	{
		wt[i]=tat[i]-bt[i];
		tot+=wt[i];
	}
	avgwt=(float)tot/n;
	printf("\nProcess\tArrival time\tBurst Time\tWaiting Time\tCompletion time\tTurn around time\t");
	for(i=0;i<n;i++)
	{printf("\np[%d]\t\t%d\t\t%d\t\t%d\t\t%d\t\t%d\n",p[i],at[i],bt[i],wt[i], ct[i],tat[i]);
	}
	printf("\nAvg. WT:%f",avgwt);
	printf("\nAvg. TAT:%f",avgtat);
	printf("\n");
	for(i=0;i<n;i++)
	{
	printf("| P%d",i);
	}
	printf("|");
	printf("\n%d",at[0]);
	for(i=0;i<n;i++)
	{
	printf("\t%d",ct[i]);
	}
	printf("\n");
	return 0;
	}