//chapter 8
//example 8.13
//page 335
printf("\n")
printf("given")
Pd=80;
Vce=60;
Ic=Pd/Vce
disp("point 1 Vce=60 and Ic=1.3A")
Vce=40;
Ic=Pd/Vce
disp("point 2 Vce=40 and Ic=2A")
Vce=20;
Ic=Pd/Vce
disp(" point 3 Vce=20 and Ic=4A")
Vce=10;
Ic=Pd/Vce
disp(" point 4 Vce=10 and Ic=8A")