Biker's Trip Odometer
Time Limit: 1000MS Memory Limit: 10000K
Total Submissions: 4743 Accepted: 3032
Description
Most bicycle speedometers work by using a Hall Effect sensor fastened to the front fork of the bicycle. A magnet is attached to one of the spokes on the front wheel so that it will line up with the Hall Effect switch once per revolution of the wheel. The speedometer monitors the sensor to count wheel revolutions. If the diameter of the wheel is known, the distance traveled can be easily be calculated if you know how many revolutions the wheel has made. In addition, if the time it takes to complete the revolutions is known, the average speed can also be calculated. For this problem, you will write a program to determine the total distance traveled (in miles) and the average speed (in Miles Per Hour) given the wheel diameter, the number of revolutions and the total time of the trip. You can assume that the front wheel never leaves the ground, and there is no slipping or skidding.
Input
Input consists of multiple datasets, one per line, of the form: diameter revolutions time The diameter is expressed in inches as a floating point value. The revolutions is an integer value. The time is expressed in seconds as a floating point value. Input ends when the value of revolutions is 0 (zero).
Output
For each data set, print: Trip #N: distance MPH Of course N should be replaced by the data set number, distance by the total distance in miles (accurate to 2 decimal places) and MPH by the speed in miles per hour (accurate to 2 decimal places). Your program should not generate any output for the ending case when revolutions is 0.
Sample Input
26 1000 5 27.25 873234 3000 26 0 1000Sample Output
Trip #1: 1.29 928.20 Trip #2: 1179.86 1415.84Hint
Constants For p use the value: 3.1415927. There are 5280 feet in a mile. There are 12 inches in a foot. There are 60 minutes in an hour. There are 60 seconds in a minute. There are 201.168 meters in a furlong.
#include<iostream> using namespace std; int main() { const double pi=3.1415927; const int mile_inch=5280*12; const int hour_second=60*60; int n; float diameter; int revol; float time; float distance; float mph; n=0; while(1) { cin>>diameter; cin>>revol; cin>>time; if(revol==0) break; n++; distance=pi*diameter*revol/mile_inch; mph=distance/(time/hour_second); printf("Trip #%d: %.2f %.2f\n",n,distance,mph); } return 0; }
转载于:https://www.cnblogs.com/w0w0/archive/2011/11/21/2257744.html
相关资源：数据结构—成绩单生成器