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  1. #include <stdio.h>
  2.  
  3. #define N 5
  4.  
  5. typedef struct {
  6.     char name[3];
  7.     int arrival;
  8.     int service;
  9.     int start;
  10.     int finish;
  11.     int turnaround;
  12.     int waiting;
  13. } Process;
  14.  
  15. int main() {
  16.     Process p[N] = {
  17.         {"P1", 0, 3},
  18.         {"P2", 2, 6},
  19.         {"P3", 4, 4},
  20.         {"P4", 6, 5},
  21.         {"P5", 8, 2}
  22.  
  23.     };
  24.  
  25.     int i, time = 0;
  26.     float sumTAT = 0, sumWait = 0, totalService = 0;
  27.  
  28.     printf("\n===== SIMULATION FCFS =====\n");
  29.  
  30.     for (i = 0; i < N; i++) {
  31.         if (time < p[i].arrival)
  32.             time = p[i].arrival;
  33.  
  34.         p[i].start = time;
  35.         p[i].finish = p[i].start + p[i].service;
  36.         p[i].turnaround = p[i].finish - p[i].arrival;
  37.         p[i].waiting = p[i].turnaround - p[i].service;
  38.  
  39.         time = p[i].finish;
  40.  
  41.         sumTAT += p[i].turnaround;
  42.         sumWait += p[i].waiting;
  43.         totalService += p[i].service;
  44.     }
  45.  
  46.     float avgTAT = sumTAT / N;
  47.     float avgWait = sumWait / N;
  48.     float throughput = (float)N / p[N-1].finish;
  49.     float cpuUtil = (totalService / p[N-1].finish) * 100;
  50.  
  51.     printf("\n%-8s%-10s%-10s%-10s%-10s%-10s%-10s\n", 
  52.         "Process", "Arrive", "Service", "Start", "Finish", "Tr", "Tw");
  53.     printf("---------------------------------------------------------------\n");
  54.  
  55.     for (i = 0; i < N; i++) {
  56.         printf("%-8s%-10d%-10d%-10d%-10d%-10d%-10d\n",
  57.             p[i].name, p[i].arrival, p[i].service,
  58.             p[i].start, p[i].finish, p[i].turnaround, p[i].waiting);
  59.     }
  60.  
  61.     printf("\n--- Résultats globaux ---\n");
  62.     printf("Temps moyen de rotation : %.2f\n", avgTAT);
  63.     printf("Temps moyen d'attente   : %.2f\n", avgWait);
  64.     printf("Débit du système        : %.2f processus/unité de temps\n", throughput);
  65.     printf("Utilisation du CPU      : %.2f %%\n", cpuUtil);
  66.  
  67.     // ===== Diagramme de Gantt =====
  68.     printf("\n--- Diagramme de Gantt ---\n\n");
  69.  
  70.     // Première ligne : barres
  71.     for (i = 0; i < N; i++) {
  72.         printf("|");
  73.         for (int j = 0; j < p[i].service; j++)
  74.             printf("█");
  75.     }
  76.     printf("|\n");
  77.  
  78.     // Deuxième ligne : noms des processus
  79.     for (i = 0; i < N; i++) {
  80.         printf("%-3s", p[i].name);
  81.         for (int j = 0; j < p[i].service; j++)
  82.             printf("  ");
  83.     }
  84.     printf("\n");
  85.  
  86.     // Troisième ligne : temps
  87.     int current = 0;
  88.     for (i = 0; i < N; i++) {
  89.         if (i == 0)
  90.             printf("%d", p[i].start);
  91.         printf("%*d", p[i].service * 2, p[i].finish);
  92.     }
  93.     printf("\n");
  94.  
  95.     return 0;
  96. }
  97.  
Success #stdin #stdout 0.01s 5288KB
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stdout
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===== SIMULATION FCFS =====

Process Arrive    Service   Start     Finish    Tr        Tw        
---------------------------------------------------------------
P1      0         3         0         3         3         0         
P2      2         6         3         9         7         1         
P3      4         4         9         13        9         5         
P4      6         5         13        18        12        7         
P5      8         2         18        20        12        10        

--- Résultats globaux ---
Temps moyen de rotation : 8.60
Temps moyen d'attente   : 4.60
Débit du système        : 0.25 processus/unité de temps
Utilisation du CPU      : 100.00 %

--- Diagramme de Gantt ---

|███|██████|████|█████|██|
P1       P2             P3         P4           P5     
0     3           9      13        18  20
https://ideone.com/sHP7Rw
language:
C (clang 8.0)
created:
12 days ago
visibility:
public

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