Testons l'exécution du programme :

./test 
f(x) drawer
x = -10  =>  f(x) = 98
x = -9.8  =>  f(x) = 94.04
x = -9.6  =>  f(x) = 90.16
x = -9.4  =>  f(x) = 86.36
x = -9.2  =>  f(x) = 82.64
x = -9  =>  f(x) = 79
x = -8.8  =>  f(x) = 75.44
x = -8.6  =>  f(x) = 71.96
x = -8.4  =>  f(x) = 68.56
x = -8.2  =>  f(x) = 65.24
x = -8  =>  f(x) = 62
x = -7.8  =>  f(x) = 58.84
x = -7.6  =>  f(x) = 55.76
x = -7.4  =>  f(x) = 52.76
x = -7.2  =>  f(x) = 49.84
x = -7  =>  f(x) = 47
x = -6.8  =>  f(x) = 44.24
x = -6.6  =>  f(x) = 41.56
x = -6.4  =>  f(x) = 38.96
x = -6.2  =>  f(x) = 36.44
x = -6  =>  f(x) = 34
x = -5.8  =>  f(x) = 31.64
x = -5.6  =>  f(x) = 29.36
x = -5.4  =>  f(x) = 27.16
x = -5.2  =>  f(x) = 25.04
x = -5  =>  f(x) = 23
x = -4.8  =>  f(x) = 21.04
x = -4.6  =>  f(x) = 19.16
x = -4.4  =>  f(x) = 17.36
x = -4.2  =>  f(x) = 15.64
x = -4  =>  f(x) = 14
x = -3.8  =>  f(x) = 12.44
x = -3.6  =>  f(x) = 10.96
x = -3.4  =>  f(x) = 9.56
x = -3.2  =>  f(x) = 8.24
x = -3  =>  f(x) = 7
x = -2.8  =>  f(x) = 5.84
x = -2.6  =>  f(x) = 4.76
x = -2.4  =>  f(x) = 3.76
x = -2.2  =>  f(x) = 2.84
x = -2  =>  f(x) = 2
x = -1.8  =>  f(x) = 1.24
x = -1.6  =>  f(x) = 0.56
x = -1.4  =>  f(x) = -0.04
x = -1.2  =>  f(x) = -0.56
x = -1  =>  f(x) = -1
x = -0.8  =>  f(x) = -1.36
x = -0.6  =>  f(x) = -1.64
x = -0.4  =>  f(x) = -1.84
x = -0.2  =>  f(x) = -1.96
x = 0  =>  f(x) = -2
x = 0.2  =>  f(x) = -1.96
x = 0.4  =>  f(x) = -1.84
x = 0.6  =>  f(x) = -1.64
x = 0.8  =>  f(x) = -1.36
x = 1  =>  f(x) = -1
x = 1.2  =>  f(x) = -0.56
x = 1.4  =>  f(x) = -0.04
x = 1.6  =>  f(x) = 0.56
x = 1.8  =>  f(x) = 1.24
x = 2  =>  f(x) = 2
x = 2.2  =>  f(x) = 2.84
x = 2.4  =>  f(x) = 3.76
x = 2.6  =>  f(x) = 4.76
x = 2.8  =>  f(x) = 5.84
x = 3  =>  f(x) = 7
x = 3.2  =>  f(x) = 8.24
x = 3.4  =>  f(x) = 9.56
x = 3.6  =>  f(x) = 10.96
x = 3.8  =>  f(x) = 12.44
x = 4  =>  f(x) = 14
x = 4.2  =>  f(x) = 15.64
x = 4.4  =>  f(x) = 17.36
x = 4.6  =>  f(x) = 19.16
x = 4.8  =>  f(x) = 21.04
x = 5  =>  f(x) = 23
x = 5.2  =>  f(x) = 25.04
x = 5.4  =>  f(x) = 27.16
x = 5.6  =>  f(x) = 29.36
x = 5.8  =>  f(x) = 31.64
x = 6  =>  f(x) = 34
x = 6.2  =>  f(x) = 36.44
x = 6.4  =>  f(x) = 38.96
x = 6.6  =>  f(x) = 41.56
x = 6.8  =>  f(x) = 44.24
x = 7  =>  f(x) = 47
x = 7.2  =>  f(x) = 49.84
x = 7.4  =>  f(x) = 52.76
x = 7.6  =>  f(x) = 55.76
x = 7.8  =>  f(x) = 58.84
x = 8  =>  f(x) = 62
x = 8.2  =>  f(x) = 65.24
x = 8.4  =>  f(x) = 68.56
x = 8.6  =>  f(x) = 71.96
x = 8.8  =>  f(x) = 75.44
x = 9  =>  f(x) = 79
x = 9.2  =>  f(x) = 82.64
x = 9.4  =>  f(x) = 86.36
x = 9.6  =>  f(x) = 90.16
x = 9.8  =>  f(x) = 94.04
Fermeture du plugin

Tout fonctionne normalement.