FCFS

#include<stdio.h>
//#include<conio.h>

void main()
{
    char pn[10][10]; //process name
    int arr[10],    //arrival time
        bur[10],        //burst time
        star[10],       //start time
        finish[10],     //finish time
        tat[10],        //turn around time
        wt[10], i, n;   //waiting time
    int totwt = 0,  // total of waiting times
    tottat = 0;         // total of turn around times
    //clrscr();
    printf("Enter the number of processes: ");
    scanf("%d", &n);
    for(i = 0; i<n ; ++i)
    {
        printf("Enter the Process Name, Arrival Time & Burst Time: ");
        scanf("%s %d %d", pn[i], &arr[i], &bur[i]);
    }
    for(i = 0; i < n; ++i)
    {
        if(i == 0)
            star[i] = arr[i];
        else
            star[i] = finish[i-1];
        wt[i] = star[i] - arr[i];
        finish[i] = star[i] + bur[i];
        tat[i] = finish[i] - arr[i];
    }
    printf("\nPName     Arrtime     Burtime    Start     TAT   Finish");
    for(i = 0; i < n; ++i)
    {
        printf("\n%s\t%6d\t\t%6d\t%6d\t%6d\t%6d", pn[i], arr[i], bur[i], star[i], tat[i], finish[i]);
        totwt += wt[i];
        tottat += tat[i];
    }
    printf("\n");
}