C++ 程序：不使用系统定义方法反转字符串

原文：https://www.studytonight.com/cpp-programs/cpp-program-to-reverse-a-string-without-using-system-defined-method

大家好！

在本教程中，我们将学习如何演示如何在不使用系统定义方法的情况下，在 C++ 编程语言中找到字符串的反转。

查找字符串反向的步骤:

1. 将要反转的字符串作为输入。

2. 初始化另一个相同长度的字符数组来存储字符串的反转。

3. 从头到尾遍历输入字符串，并将每个字符存储在新创建的字符数组中。

代号:

#include <iostream>
#include <stdio.h>

using namespace std;

int main()
{
    cout << "\n\nWelcome to Studytonight :-)\n\n\n";
    cout << " =====  Program to Reverse the String without using System defined function, in CPP  ===== \n\n";

    //Variable Declaration
    char s1[100], c = 'a';
    int n = 0, i = 0;

    cout << "\n\nEnter the String you want to reverse: ";
    cin >> s1;

    //Computing string length without using system defined method
    while (c != '\0')
    {
        c = s1[i];
        i++;
    }
    n = i - 1;

    cout << "\n\nLength of the entered string \"" << s1 << "\" is : " << n << "\n\n\n";

    //Declaring another char array to store the reverse of the string
    char s2[i];

    i = 0;
    //Logic to store the reverse of a string in another char array
    while (i != n + 1)
    {
        s2[i] = s1[n - i - 1];
        i++;
    }

    cout << "\n\nReverse of the entered string \"" << s1 << "\" is : \"" << s2 << "\"\n\n\n";

    return 0;
}

输出:

我们希望这篇文章能帮助你更好地理解在 C++ 中不用系统定义的方法就能找到字符串的反转的概念。如有任何疑问，请随时通过下面的评论区联系我们。

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