//chapter 17
//example 17.2
//page 718
printf("\n")
printf("given")
Ib=500*10^-9;f=1*10^3;
R1=(70*10^-3)/Ib
R1=140*10^3;//use standard value
R2=R1;
C1=(1/(2*3.14*R1*f))*10^12;
printf(" capacitor used is of %dpF\n",C1)