c++ - 段错误c++为什么我的程序给我段错误

Question

为什么我的代码有段错误？我想看看字符串中是否有两个相同的字母。但是怎么会出现段错误呢？

#include<iostream>
#include<cstring>
using namespace std;

bool match(char[], int);

int main()
{
    char word[20];
    cout << "Enter a word: ";
    cin >> word;
    int length = strlen(word);
    if (match(word, length)) cout << "It has two letters that are the same" <<
        endl;
    else cout << "There is no same letters" << endl;
    return 0;
}

bool match(char word[], int length)
{
    bool found = false;
    for (int i = 0; i < length; i++)
    {
        for (int j = 1; i < length; j++)
        {
            if (j <= i || j == length || i == length) continue;
            if (word[i] == word[j]) found = true;
        }
    }
    return found;
}

Answer 1

您是有意将 i 包含在您的 j 循环中还是偶然？

引用:

 "for (int j = 1; i < length; j++)"

Should this be: for (int j; j<length; j++)?

请记住，一些段错误具有内存管理问题，而不仅仅是逻辑问题。检查以确保您的 sizeof 运算符正常运行，这就是我通常搞砸的地方