FCFS..

#include <stdio.h>

struct process
{
  char name[5];
  int burst;
};

int
main ()
{
  int size;
  int warr[size + 1];
  int carr[size+1];
  printf ("\nEnter the number of processes  : ");
  scanf ("%d", &size);
  struct process arr[size];
  struct process Process;
  printf ("\nEnter the process name and burst time  : \n");
  for (int i = 0; i < size; i++)
    {
      printf("\t-->\t");
      scanf ("%s", Process.name);
      scanf ("%d", &Process.burst);
      arr[i] = Process;
    }
  float waiting = 0,complete=0;
  warr[0] = 0;
  for(int i=0;i<size;i++){
      warr[i+1] = warr[i]+arr[i].burst;
      waiting += warr[i];
  }

  for(int i=0;i<size;i++){
      carr[i] = arr[i].burst + warr[i];
      complete+=carr[i];
  }
  printf("Process\tBurst Time\tWaiting Time\tCompletion Time\n");
  for(int i=0;i<size;i++){
      printf("%s\t%d ms\t\t%d ms\t\t%d ms\n",arr[i].name,arr[i].burst,warr[i],carr[i]);
  }


  printf ("\nAverage Waiting Time : %.2f ms", waiting / size);

  printf ("\nAverage Completion Time : %.2f ms\n", complete / size);
}