Answer to Question #250271 in C++ for John

Question

The diameter of a cycle wheel is D. Given that, the cycle travels at an average speed of X km/h,

find the number of revolutions made by the wheel per minute, giving your answer to the nearest whole

number (assume PI = 3.142). Write a C++ function to calculate revolutions per minute.

Answer 1

#define PI 3.142

#include <math.h>

int calcrev(double D, double X) {

    double C = PI * D;

    X = X * 1000.0 / 60.0;

    return (int)round(X / C);

}