Poj 2501 average speed (a good question)

[Title Description]: Give us time and speed, and let us find the distance from leaving

[Analysis]: The question was not clearly displayed at the beginning, so I understood it after looking at other people's questions.

Summary of this question:

1. Time Input Method: scanf ("% d: % d", & H, & M, & S). Pay attention to accumulation!

2. for space input control, char CH = getchar () is used. It also serves as a condition for determining whether to output an identifier.

3. accumulate more methods for similar questions.

Code reference.

// 144K 0Ms#include<iostream>using namespace std;int cal(int h,int m,int s){      return h*3600+m*60+s;  }int main(){int h,m,s;      double speed=0;      double ans=0;      int last=0;     while(scanf("%d:%d:%d",&h,&m,&s)!=EOF)    {    char ch = getchar();    if(ch == ' ')    {    int a;    scanf("%d",&a);    int now = cal(h,m,s);    ans += (now - last)*speed;    last = now;    speed = a/3.6;    }    else    printf("%02d:%02d:%02d %.2f km\n",h,m,s,((cal(h,m,s)-last)*speed+ans)/1000);    }    return 0;}

Poj 2501 average speed (a good question)