Write a C++ program that takes in the radius (as in integer) of a circle from user and calculate the area of the circle through a function. If the area is greater than 50, display the circle’s area along with a message that the circle is big else display the circle’s area and the message that the circle is small. Define a function named calculateArea() to take in the radius as its argument and calculate the circle’s area before returning the area as type double.
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Expert's answer
2011-02-18T06:14:11-0500
#include <iostream> #include <cmath>
using namespace std;
double calculateArea(double);
int main(int argc, char** argv) { double radius; do { cout << "Input the value of radius: "; cin >> radius; } while(radius <= 0); double area = calculateArea(radius); if(area > 50) cout << area << endl << "The circle is big." << endl; else cout << area << endl << "The circle is small." << endl; return 0; }
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