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//program to create two functions that find area and circumference of circle (radius of circle is passed to functions as argument) #include<iostream.h> #include<conio.h> void area(int); void circumference(int); void area(int radius) { float ar; ar=3.14*radius*radius; cout<<"area of circle is "<<ar; } void circumference(int radius) { float cir; cir=2*3.14*radius; cout<<"circumference of circle is "<<cir; } void main() { int r; clrscr(); cout<<"enter radius of circle "; cin>>r; area(r); circumference(r); getch(); }