unsigned 和 signed 的比較 (怪)

unsigned int i=1;
int j=-1
if(i>j) printf(“i>j”);
else printf(“j>i);

用VS2008 C++竟然出現 j>i。

uint i=1;
j=-1;
if(i>j) Console.Write(“i>j”);
else Console.Write(“j>i);

這次用C#就印出正常的 i>j。

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One Response to unsigned 和 signed 的比較 (怪)

  1. Luse says:

    C# 跟 C 遇到這種狀況的處理是不太一樣 如果是C 的話 依ISO C99 的 Rule 這樣的狀況 j>i 的確是符合Spec的如果是C#的話 在Spec內提到這種狀況應該做promotion 所以會有這樣的結果也是對的

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