C++结构初始化断言失败
#include <cassert>
#include <string>
struct AStruct
{
int x;
char* y;
int z;
};
int main()
{
AStruct structu = {4, "Hello World"};
assert(structu.z == ???);
}
我应该写什么来代替 ??? 才能成功断言？
我使用了 assert(structu.z == 0); 但不幸的是得到了错误int main(): 断言“structu.z == 0 failed.Aborted”
#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 errorint main(): Assertion 'structu.z == 0 failed.Aborted'
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评论（3）
您想要：
您的代码分配给 z 成员而不是测试它。如果您确实收到了编辑问题所说的消息，则说明您的编译器已损坏。是哪一个？
You want:
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?
assert(structu.z == 0)应该可以工作，因为成员z将会被初始化。assert(structu.z == 0)should work because the memberzwould be value initialized.我假设您所说的“成功”是指不会创建错误消息。您可能想要：
请注意，我使用的是
==，而不是=。该断言永远不应该触发，因为使用给定的代码，
structu.z保证等于0。By "successful", I'm assuming you mean one that doesn't create an error message. You probably want:
Note that I'm using
==, and not=.This assertion should never trigger, because with the code given,
structu.zis guaranteed to be equal to0.