Question

我一直试图在过去几周内完成这项工作，而且我一直在搞乱我的代码，但我所做的一切似乎都没有帮助。我在编制总降雨量，平均降雨量和检查是否有超过12天的干旱和超过5天的洪水，雨水等于至少6英寸时遇到了问题。请帮我。我在Python 3.3中这样做。我正在模拟108天，然后一个世纪。我真的很感激一些帮助。当我运行这个程序时，我得到一个totalRain的数字，但不是降雨加起来的。对于洪水，我想使用if部分的洪水部分，但我不知道如何。对于干旱，我需要证明是否有一场12天或更长时间没有下雨的干旱。

import random 
import math 

def rainFallAmount(x): 
    if chance<=0.71: 
        rainfall=0; 
    elif chance<=0.78: 
        rainfall=0.5; 
    elif chance<=0.85: 
        rainfall=0.75; 
    elif chance<=0.92: 
        rainfall=1.0; 
    elif chance<=0.98: 
        rainfall=1.5; 
    else: 
        rainfall=2.0; 
    return rainfall; 


totalRain = 0; 
day=109; 
num_days_no_rain = 0; # max_days_without_rain 
days_of_drought = 0; # days_not_raining 
days_over15 = 0; 
days_rained = 0; 
years = 100; 
#last_5_days = [0, 0, 0, 0, 0]; 
days = 36500; 
max_drought = 0; 

#This for loop is for 108 days. 
for day in range(109): 
    chance=random.uniform(0,1); 
    rainfall=rainFallAmount(chance); 
    print(rainfall); 
#last_5_days=[day%5]; 
#last_5_days= rainfall; 
#math.fsum([last_5_days]) > 6 
#there was a flood 
    if rainfall<0.5: 
        days_of_drought+=1; 
        days_rained=0; 
        num_days_no_rain+=1; 
    if days_of_drought>max_drought: 
        max_drought=days_of_drought; 
    else: 
        days_rained+=1; 
        if rainfall>=1.5: 
            days_over15+=1; 
            if rainfall>=0.5: 
                totalRain+=1; 
                avgRain=totalRain/day; 

print(rainfall); 
print("The number of days the rain was greater than 1.5 inches: ", days_over15); 
print("The longest period of no rain is: ", num_days_no_rain); 
print("The total rain for", day, "days is:", totalRain); 
print("The average rain per day is: ", avgRain); 
print("The longest period of rain is: ", days_rained); 
print("Longest drought was: ", days_of_drought,"days"); 

#This for loop is for a whole century. 
for years in range(36500): 
    chance=random.uniform(0,1); 
    rainfall =rainFallAmount(chance); 
    print(rainfall); 
    if rainfall == 0: 
        days_of_drought+=1; 
        days_rained=0; 
    if days_of_drought>max_drought: 
        max_drought=days_of_drought; 
        days_rained+=1 
        if rainfall>=0.5: 
            totalRain+=1; 
            avgDayRain=(totalRain/day;)
            avgYearRain=(totalRain/years); 


print("The longest period of no rain is: ", noRain); 
print("The total rain for", years, "years is:", totalRain); 
print("The average rain per year is: ", avgYearRain); 
print("The average rain per day is: ", avgDayRain);

Answer 1

如果我理解正确，您希望变量totalRain包含模拟中所有降雨量的总和。您的代码中存在许多问题，我只会解决其中的一些问题。

问题出在这个if语句中：

if days_of_drought>max_drought: 
    max_drought=days_of_drought; 
else: 
    days_rained+=1; 
    if rainfall>=1.5:    <--- HERE
        days_over15+=1; 
        if rainfall>=0.5: 
            totalRain+=1; <-- HERE
            avgRain=totalRain/day;

在英语中，这说：＆＃34;如果降雨量超过1.5英寸，则在所有降雨量的总和上加1。＆＃34;您可能想说：＆＃34;将降雨量添加到所有降雨量的总和中。（不管下雨多少）。＆＃34;

除此之外，if rainfall>=0.5没有意义，因为它已经在降雨量超过1.5的分支中，因此肯定高于0.5。

作为旁注，你不需要任何分号。

尝试查看以下内容是否符合您的要求：

totalRain+=rainfall
if days_of_drought>max_drought: 
    max_drought=days_of_drought
else: 
    days_rained+=1
    if rainfall>=1.5:
        days_over15+=1
        avgRain=totalRain/day

最后一个计算avgRain的陈述对我来说似乎有问题。您可能想要确切地考虑该变量的含义以及如何正确计算它。

模拟Python中的降雨量

1 个答案: