//chapter 6
//example 6.7
//page 259
printf("\n")
printf("given")
Ic=1.5*10^-3;Rc=4.7*10^3;Rl=56*10^3;
Ie=Ic;
re=(26*10^-3)/Ie
Av=-(((Rc*Rl)/(Rc+Rl))/re);
printf(" voltage gain is %d\n",Av)