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- #include<stdio.h>
- #include<malloc.h>
- void main()
- {
- int n, i, tempn, count, terminaltime=0, initialtime, qt, flag=0, *bt, *wt, *tat, *tempbt;
- float avgwt = 0, avgtat = 0;
- printf("\n Enter the number of processes : ");
- scanf("%d", &n);
- tempn = n;
- tempbt = (int*)malloc(n*sizeof(int));
- bt = (int*)malloc(n*sizeof(int));
- wt = (int*)malloc(n*sizeof(int));
- tat = (int*)malloc(n*sizeof(int));
- printf("\n Enter the Quantum Time : ");
- scanf("%d", &qt);
- printf("\n Enter the burst time for each process \n\n");
- for(i=0; i<n; i++)
- {
- printf(" Burst time of P%d : ", i);
- scanf("%d", &bt[i]);
- tempbt[i] = bt[i];
- terminaltime += bt[i];
- }
- wt[0] = 0;
- printf("\n GAANT CHART \n");
- printf("\n-------------\n");
- for(terminaltime=0, count=0; tempn!=0;) {
- initialtime = terminaltime;
- if(tempbt[count] <= qt && tempbt[count] > 0) {
- terminaltime += tempbt[count];
- tempbt[count] = 0;
- wt[count] = terminaltime - bt[count];
- tat[count] = wt[count] + bt[count];
- flag = 1;
- }
- else if(tempbt[count] > qt) {
- tempbt[count] -= qt;
- terminaltime += qt;
- }
- if(tempbt[count] == 0 && flag == 1) {
- tempn--;
- flag=0;
- }
- if(initialtime != terminaltime) {
- printf(" %d\t|| P%d ||\t%d\n", initialtime, count, terminaltime);
- }
- if(count == n-1)
- count = 0;
- else
- ++count;
- }
- printf("\n PROCESS \t BURST TIME \t WAITING TIME \t TURNAROUND TIME \n");
- printf("--------------------------------------------------------------\n");
- for(i=0; i<n; i++)
- {
- printf(" P%d \t\t %d \t\t %d \t\t %d \n", i, bt[i], wt[i], tat[i]);
- }
- for(i=0; i<n; i++) {
- avgwt += wt[i];
- avgtat += tat[i];
- }
- avgwt = avgwt/n;
- avgtat = avgtat/n;
- printf("\n Average Waiting Time = %f \n Average Turnaround Time = %f \n", avgwt, avgtat);
- }
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