声明一个结构变量,它是另一个结构的动态数组。为什么下面的C++程序会崩溃?
我已经声明了一个结构变量,它是另一个结构的动态数组,但程序每次都崩溃。我哪里做错了?需要采取哪些必要步骤?我正在使用 DEVC++。
#include<iostream>
#include<cstdlib>
using namespace std;
struct Project{
int pid;
string name;
};
struct employee{
int eid;
string name;
Project *project_list;
};
int main(){
struct employee e;
e.eid = 123;
e.name = "789";
e.project_list = (Project *)malloc(2 * sizeof(Project));
e.project_list[0].pid = 100;
e.project_list[0].name = "Game";
}
回答
malloc()不会正确初始化编译类,不应在 C++ 中使用。您应该使用new或new[]代替。
e.project_list = new Project[2];
- @SaubhikPaladhi: If this was C code, you wouldn't be using a `string` class that is assumed to already be initialized. Your bug occurred because you're mixing C constructs and C++ constructs together.
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