Question

我刚刚开始学习c ++，这是我用结构体完成的第一段代码，但是当我运行它时，我遇到了分段错误。我正在使用g ++在linux中编译它。任何人都可以看到错误的位置，我明白是什么原因导致分段错误，但我看不出是什么导致它。

所有帮助表示赞赏。

#include <iostream>
using namespace std;

struct people
{
string forename;
string lastname;
int age;
};

int main()
{
int num_numbers; //ask the user how many numbers the sequence will contain
cout << "Enter how people will be entered : \n";
cin >> num_numbers; // stores the user input

people peoples[num_numbers];

for(int x = 0; x < num_numbers; x++) 
{
   cout<<"Enter forename "<< x <<":\n";
   cin >> peoples[x].forename;
   cout<<"Enter surname "<< x <<":\n";
   cin >> peoples[x].lastname;
   cout<<"Enter age "<< x <<":\n";
   cin >> peoples[x].age;
}

for(int i = 0; i<= num_numbers; i++)
{
    cout << peoples[i].forename;

    cout << peoples[i].lastname;

    cout << peoples[i].age;
}

//delete[] peoples;
}

Answer 1

首先，这个：

people peoples[num_numbers];

是非标准扩展名。其次，这里：

for(int i = 0; i<= num_numbers; i++)
//             ^^^^^^^^^^^^^^^

你出界了，因为大小为num_numbers的数组的索引从0到num_numbers - 1。

C ++分段故障结构

1 个答案: