复制字符串的函数(迭代和递归)
原文:https://www . geesforgeks . org/function-copy-string-iterative-recursive/
给定两个字符串，使用递归将一个字符串复制到另一个字符串。我们基本上需要用 C/C++ 编写自己的递归版本 strcpy
示例:
Input : s1 = "hello"
s2 = "geeksforgeeks"
Output : s2 = "hello"
Input : s1 = "geeksforgeeks"
s2 = ""
Output : s2 = "geeksforgeeks"
迭代: 从 index = 0 开始将每个字符从 s1 复制到 s2，并在每次调用中将 index 增加 1，直到 s1 没有到达终点；
C++
// Iterative CPP Program to copy one String
// to another.
#include <bits/stdc++.h>
using namespace std;
// Function to copy one string to other
// assuming that other string has enough
// space.
void myCopy(char s1[], char s2[])
{
int i = 0;
for (i=0; s1[i] != '\0'; i++)
s2[i] = s1[i];
s2[i] = '\0';
}
// Driver function
int main()
{
char s1[100] = "GEEKSFORGEEKS";
char s2[100] = "";
myCopy(s1, s2);
cout << s2;
return 0;
}
Java 语言(一种计算机语言，尤用于创建网站)
// Iterative Java Program to copy one String
// to another.
class GFG
{
// Function to copy one string to other
// assuming that other string has enough
// space.
static void myCopy(char s1[], char s2[])
{
int i = 0;
for (i = 0; i < s1.length; i++)
s2[i] = s1[i];
}
// Driver code
public static void main(String[] args)
{
char s1[] = "GEEKSFORGEEKS".toCharArray();
char s2[] = new char[s1.length];
myCopy(s1, s2);
System.out.println(String.valueOf(s2));
}
}
// This code contributed by Rajput-Ji
Python 3
# recursive Python Program to copy one String
# to another.
# Function to copy one string to other
def copy_str(x,y):
if len(y)==0:
return x
else:
c = copy_str(x,(y)[1:-1])
return c
x = input()
y = input()
print(copy_str(x,y))
# This code contributed by deeksha20049@iiid.ac.in
#deeksha20049
C
// Iterative C# Program to copy one String
// to another.
using System;
class GFG
{
// Function to copy one string to other
// assuming that other string has enough
// space.
static void myCopy(char []s1, char []s2)
{
int i = 0;
for (i = 0; i < s1.Length; i++)
s2[i] = s1[i];
}
// Driver code
public static void Main(String[] args)
{
char []s1 = "GEEKSFORGEEKS".ToCharArray();
char []s2 = new char[s1.Length];
myCopy(s1, s2);
Console.WriteLine(String.Join("", s2));
}
}
// This code is contributed by 29AjayKumar
java 描述语言
<script>
// Iterative Javascript Program to copy one String
// to another.
// Function to copy one string to other
// assuming that other string has enough
// space.
function myCopy(s1, s2)
{
let i = 0;
for (i = 0; i < s1.length; i++)
s2[i] = s1[i];
}
// Driver code
// Driver Code
let s1 = "GEEKSFORGEEKS";
let s2 = [];
let index = 0;
myCopy(s1, s2, index);
document.write(s2.join(""));
// This code contributed by shivanisinghss2110
</script>
Output:
GEEKSFORGEEKS
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