这个c ++反向字符串函数有什么问题 [英] Whats wrong with this c++ reverse string function

问题描述

void reverse (char s[]){
int len = strlen(s);
int j = len - 1;
for (int i = 0; i < j; i++,j--){
    cout << s[i];
    char ch = s[i];
    s[i] = s[j]; //error line - giving exception, cannot write to the memory
    s[j] = ch;
    }
}

我使用Visual Studion 2008，理解什么是这里的问题..：.. ..我从C ++实践：$。

I am using Visual Studion 2008 and i can't understand whats the problem here .. :s .. I am out of C++ practice :$ .

推荐答案

问题是使用C风格字符串而不是C ++风格字符串。特别是，你显然试图写一个常量字符串字面值：

The problem is that it uses C-style strings instead of C++ style strings. In particular, you are apparently trying to write to a constant string literal:

char const* str = "I cannot be written to";

C ++允许忽略 const

最后，C ++已经有一个反向 function：

Finally, C++ already has a reverse function:

#include <algorithm>
#include <iostream>
#include <string>

int main() {
    std::string str = "Hello world";
    std::reverse(str.begin(), str.end());
    std::cout << str << std::endl;
}

这篇关于这个c ++反向字符串函数有什么问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！