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題目概要：
給定目前時間，跟目前速度(如果只有時間，則速度不改變)，求出目前所走的距離。
解題方向：
時間*速度=距離。
程式碼：
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| //Java | |
| import java.util.Scanner; | |
| class uva10281{ | |
| public static void main(String args[]){ | |
| Scanner sc=new Scanner(System.in); | |
| double km=0,v=0,v1=0,time=0,time2=0; | |
| int startTime=0; | |
| while(sc.hasNextLine()){ | |
| int i=0; | |
| String st[]=sc.nextLine().split(" "); //時間、速度分開。 | |
| while(st[i].equals(""))i++; | |
| //時間換算成秒。 | |
| String stString[]=st[i].split(":"); | |
| time=Double.parseDouble(stString[0])*3600+Double.parseDouble(stString[1])*60+Double.parseDouble(stString[2])*1; | |
| km+=(time-time2)*v/3600; //距離計算。 | |
| time2=time; | |
| //Output | |
| if(st.length==1){ | |
| System.out.printf("%s %.2f km",st[0],km); | |
| System.out.println(""); | |
| }else{ | |
| v=Double.parseDouble(st[i+1]); | |
| } | |
| } | |
| } | |
| } |
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