Untitled

#include <bits/stdc++.h>
using namespace std;
struct Prs
{
int id;
int at;
int bt;
int ct;
int tat;
int wt;
};

int main(){
int n;
cout<<"enter the number of processes: ";
cin>>n;
cout<<"\n";
vector<Prs> pr(n);

for(int i=0;i<n;i++)
{
pr[i].id=i+1;
cout<<"enter arrival time for process "<<i+1<<" ";
cin>>pr[i].at;
cout<<"\n";
cout<<"enter burst time for process "<<i+1<<" ";
cin>>pr[i].bt;
cout<<"\n";
}

sort(pr.begin(),pr.end(),[](Prs a, Prs b) {
return a.at < b.at;});

int curt=0;
float totat=0, towt=0;

for(int i=0;i<n;i++){

     if(curt<pr[i].at){
	curt = pr[i].at;
	}

pr[i].ct = curt + pr[i].bt;
pr[i].tat = pr[i].ct - pr[i].at;
pr[i].wt = pr[i].tat - pr[i].bt;

curt = pr[i].ct;
totat += pr[i].tat;
towt += pr[i].wt;
}



for(auto &p: pr){
cout<< "P" << p.id << "\t" <<p.at<<"\t"<<p.bt<<"\t"<<p.ct<<"\t"<<p.tat<<"\t"<<p.wt<<endl;}

cout<<"Gantt chart:\n";
//cout<<"\t";
for(auto &p:pr){
cout<< "  P"<<p.id<< "\t|";
}
cout<<"\n";
cout<<pr[0].at;
for(auto &p:pr){
cout<<"\t"<<p.ct;
}

cout<<"\nAverage turn around time is: "<<totat/n<<endl;
cout<<"Average waiting time is: "<<towt/n<<endl;

return 0;
}