if - else vs if和返回revisited(不是询问多个返回ok或不) [英] if - else vs if and returns revisited (not asking about multiple returns ok or not)
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问题描述
对于来自代码完成的示例:
比较比较(int value1,int value2)
{
if(value1< value2)
return Comparison_LessThan;
else if(value1> value2)
return Comparison_GreaterThan;
else
return Comparison_Equal;
}
您也可以写为:
比较比较(int value1,int value2)
{
if(value1< value2)
return Comparison_LessThan;
if(value1> value2)
return Comparison_GreaterThan;
return Comparison_Equal;
}
哪个更好? (可读性等等)
解决方案
除了可读性之外,编译器应该足够智能以为这两种情况生成相同的代码。 p>
With regards this example from Code Complete:
Comparison Compare(int value1, int value2)
{
if ( value1 < value2 )
return Comparison_LessThan;
else if ( value1 > value2 )
return Comparison_GreaterThan;
else
return Comparison_Equal;
}
You could also write this as:
Comparison Compare(int value1, int value2)
{
if ( value1 < value2 )
return Comparison_LessThan;
if ( value1 > value2 )
return Comparison_GreaterThan;
return Comparison_Equal;
}
Which is more optimal though? (readability, etc aside)
解决方案
Readability aside, the compiler should be smart enough to generate identical code for both cases.
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