使用简单的assert()宏

发布于 2024-09-29 10:14:22 字数 802 浏览 2 评论 0原文

我是编程新手我在翻阅一本书时发现了这段代码。我相信它给出了如何使用定义的assert()宏的示例。它无法在 code::blocks 10.05 上编译。我收到错误，例如

“#”后面没有宏参数
未终止#else
in function 'int main()' 'ASSERT' was not statements in thisscope

代码：

#include<iostream>
#define DEBUG

#ifndef DEBUG  
#define ASSERT(x)
#else
#define ASSERT(x)\   
if(!(x))\
{\
       cout<<"Error!!Assert"<<#x<<"failed\n";\
       cout<<"on line"<<__LINE__<<"\n";\
       cout<<"in file"<<__FILE__<<"\n";\
}\
#endif

using namespace std;

int main()
{
    int x = 5;
    cout<<"\nFirst assert.";
    ASSERT(x==5);
    cout<<"\nSecond assert.";
    ASSERT(x!=5);
    cout<<"\nDone."<<endl;

    return 0;
}

任何帮助将不胜感激。提前致谢。

原文

I'm new to programming & i found this code when i was going through a book. I believe it gives an example of how to use a defined assert() macro. It doesn't compile on code::blocks 10.05. I get errors such as

'#' is not followed by a macro parameter
unterminated #else
in function 'int main()' 'ASSERT' was not declared in this scope

Code:

#include<iostream>
#define DEBUG

#ifndef DEBUG  
#define ASSERT(x)
#else
#define ASSERT(x)\   
if(!(x))\
{\
       cout<<"Error!!Assert"<<#x<<"failed\n";\
       cout<<"on line"<<__LINE__<<"\n";\
       cout<<"in file"<<__FILE__<<"\n";\
}\
#endif

using namespace std;

int main()
{
    int x = 5;
    cout<<"\nFirst assert.";
    ASSERT(x==5);
    cout<<"\nSecond assert.";
    ASSERT(x!=5);
    cout<<"\nDone."<<endl;

    return 0;
}

Any help would be greatly appreciated. Thanks in advance.

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世俗缘 2024-10-06 10:14:22

if(!(x))\
{\
       cout<<"Error!!Assert"<<#x<<"failed\n";\
       cout<<"on line"<<__LINE__<<"\n";\
       cout<<"in file"<<__FILE__<<"\n";\
} // no backslash

if(!(x))\
{\
       cout<<"Error!!Assert"<<#x<<"failed\n";\
       cout<<"on line"<<__LINE__<<"\n";\
       cout<<"in file"<<__FILE__<<"\n";\
} // no backslash

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