ios测试宏指令出错：“Expected identefier”

写了一个简单的测试宏指令，然后在下面代码中报错，不知道怎么修复？谢谢

#define test(condition) do{\

    if (condition)

    {\        //// <-----Expected identifier or (

        NSlog @"passed: " %@ #condtion); \

    }

    else

    {\

        NSLog(@"failed: " @ #condition); \

    }

}   //// <-----extraneous closing brace ( "}")

2个回答

你应该在每行宏指令的末尾加一个反斜杠，最后一个不用加

#define test(condition) do{\

    if (condition) \

    {\

        NSlog @"passed: " %@ #condtion); \

    } \

    else \

    { \

        NSLog(@"failed: " @ #condition); \

    } \

}

简单方法:

#define test(condition) NSLog("%s: %s\n", condition ? "Passed" : "Failed", #condition);

调用：

int i = 6;

test(i > 8);

test(i < 8);

输出：

Failed: i > 8

Passed: i < 8

转；http://ask.csdn.net/questions/1090