C++中第N+1天的降雨概率
给定一个包含0和1的数组,其中0表示无雨,1表示雨天。任务是计算第N+1天的降雨概率。
为了计算第N+1天的降雨概率,我们可以应用以下公式:
集合中雨天的总数 / 总天数
输入
arr[] = {1, 0, 0, 0, 1 }输出
probability of rain on n+1th day : 0.4
说明
total number of rainy and non-rainy days are: 5 Total number of rainy days represented by 1 are: 2 Probability of rain on N+1th day is: 2 / 5 = 0.4
输入
arr[] = {0, 0, 1, 0}输出
probability of rain on n+1th day : 0.25
说明
total number of rainy and non-rainy days are: 4 Total number of rainy days represented by 1 are: 1 Probability of rain on N+1th day is: 1 / 4 = 0.25
程序中使用的步骤如下:
输入数组的元素
输入1表示雨天
输入0表示非雨天
应用上述公式计算概率
打印结果
算法
Start
Step 1→ Declare Function to find probability of rain on n+1th day
float probab_rain(int arr[], int size)
declare float count = 0, a
Loop For int i = 0 and i < size and i++
IF (arr[i] == 1)
Set count++
End
End
Set a = count / size
return a
step 2→ In main()
Declare int arr[] = {1, 0, 0, 0, 1 }
Declare int size = sizeof(arr) / sizeof(arr[0])
Call probab_rain(arr, size)
Stop示例
#include <bits/stdc++.h>
using namespace std;
//probability of rain on n+1th day
float probab_rain(int arr[], int size){
float count = 0, a;
for (int i = 0; i < size; i++){
if (arr[i] == 1)
count++;
}
a = count / size;
return a;
}
int main(){
int arr[] = {1, 0, 0, 0, 1 };
int size = sizeof(arr) / sizeof(arr[0]);
cout<<"probability of rain on n+1th day : "<<probab_rain(arr, size);
return 0;
}输出
如果运行以上代码,将生成以下输出:
probability of rain on n+1th day : 0.4
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