生成长度为 N 的随机二进制字符串
原文:https://www . geesforgeks . org/generate-a-random-binary-string-of-length-n/
给定一个正整数 N ，任务是生成一个长度为 N 的随机二进制字符串。
示例:
输入:N = 7 T3】输出: 1000001
输入:N = 5 T3】输出: 01001
方法:给定的问题可以通过使用 rand()函数来解决，该函数在范围【0，RAND _ MAX】内生成随机数，借助该函数返回的值，可以将任意范围【L，R】内的任意数生成为(RAND()%(R–L+1))+L。按照以下步骤解决问题:
下面是上述方法的实现:
C++
// C++ program for the above approach
#include <bits/stdc++.h>
using namespace std;
// Function to find a random
// number between 0 or 1
int findRandom()
{
// Generate the random number
int num = ((int)rand() % 2);
// Return the generated number
return num;
}
// Function to generate a random
// binary string of length N
void generateBinaryString(int N)
{
srand(time(NULL));
// Stores the empty string
string S = "";
// Iterate over the range [0, N - 1]
for (int i = 0; i < N; i++) {
// Store the random number
int x = findRandom();
// Append it to the string
S += to_string(x);
}
// Print the resulting string
cout << S;
}
// Driver Code
int main()
{
int N = 7;
generateBinaryString(N);
return 0;
}
Java 语言(一种计算机语言，尤用于创建网站)
// Java program for the above approach
class GFG{
// Function to find a random
// number between 0 or 1
static int findRandom()
{
// Generate the random number
int num = (1 + (int)(Math.random() * 100)) % 2;
// Return the generated number
return num;
}
// Function to generate a random
// binary string of length N
static void generateBinaryString(int N)
{
// Stores the empty string
String S = "";
// Iterate over the range [0, N - 1]
for(int i = 0; i < N; i++)
{
// Store the random number
int x = findRandom();
// Append it to the string
S = S + String.valueOf(x);
}
// Print the resulting string
System.out.println(S);
}
// Driver Code
public static void main (String[] args)
{
int N = 7;
generateBinaryString(N);
}
}
// This code is contributed by AnkThon
Python 3
# Python3 program for the above approach
import random
# Function to find a random
# number between 0 or 1
def findRandom():
# Generate the random number
num = random.randint(0, 1)
# Return the generated number
return num
# Function to generate a random
# binary string of length N
def generateBinaryString(N):
# Stores the empty string
S = ""
# Iterate over the range [0, N - 1]
for i in range(N):
# Store the random number
x = findRandom()
# Append it to the string
S += str(x)
# Print the resulting string
print(S)
# Driver Code
N = 7
generateBinaryString(N)
# This code is contributed by sanjoy_62
C
// C# program for the above approach
using System;
using System.Collections.Generic;
using System.Linq;
public class GFG {
// Function to find a random
// number between 0 or 1
static int findRandom()
{
// For random generator
Random rand = new Random();
// Generate the random number
int num = rand.Next() % 2;
// Return the generated number
return num;
}
// Function to generate a random
// binary string of length N
static void generateBinaryString(int N)
{
// Stores the empty string
string S = "";
// Iterate over the range [0, N - 1]
for(int i = 0; i < N; i++)
{
// Store the random number
int x = findRandom();
// Append it to the string
S = S + x.ToString();
}
// Print the resulting string
Console.WriteLine(S);
}
// Driver Code
public static void Main (string[] args)
{
int N = 7;
generateBinaryString(N);
}
}
// This code is contributed by code_hunt.
java 描述语言
<script>
// Javascript program for the above approach
// Function to find a random
// number between 0 or 1
function findRandom() {
// Generate the random number
let num =
(1 + parseInt((Math.random() * 100))) % 2;
// Return the generated number
return num;
}
// Function to generate a random
// binary string of length N
function generateBinaryString(N) {
// Stores the empty string
let S = "";
// Iterate over the range [0, N - 1]
for (let i = 0; i < N; i++) {
// Store the random number
let x = findRandom();
// Append it to the string
S += (x).toString();
}
// Print the resulting string
document.write(S)
}
// Driver Code
let N = 7;
generateBinaryString(N);
// This code is contributed by Hritik
</script>
Output:
0101101
时间复杂度:O(N) T5辅助空间:** O(N)
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