C++ 结构初始化断言失败

Question

#include <cassert>
#include <string>
struct AStruct 
{ 
    int x; 
    char* y; 
    int z; 
};
int main()
{ 
    AStruct structu = {4, "Hello World"};
    assert(structu.z == ???);
}

What should I write in place of ??? to have a successful assertion?
I used assert(structu.z == 0); but unfortunately got the error
int main(): Assertion 'structu.z == 0 failed.Aborted'

Answer 1

You want:

 assert(structu.z == 0);

Your code assigns to the z member instead of testing it. And if you did get the message your edited question says you did, your compiler is broken. Which one is it?

Answer 2

By "successful", I'm assuming you mean one that doesn't create an error message. You probably want:

assert(structu.z == 0);

Note that I'm using == , and not = .

This assertion should never trigger, because with the code given, structu.z is guaranteed to be equal to 0 .

Answer 3

assert(structu.z == 0) should work because the member z would be value initialized.