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
", 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