什么是INT加UINT的返回值？ [英] What is the return value of int plus uint?

问题描述

我有两个变量：

int a;
uint b;

我也有一个数组：

I also have an array:

float c[100];

如果我想通过 A + B 作为数组的索引 C 这样：

If I want to pass a+b as the index of array c such that:

c[a+b] = 10.0;

为了安全，我们应该确保 A + B 收益 UINT 。是否返回单元？

我应该强迫其返回值是一个 UINT ？

Should I force its return value to be an uint?

推荐答案

是的，当你添加一个 INT 和 unsigned int类型的 INT 价值提升为 unsigned int类型，所以你会没事的。要小心，一不为负，然而，你还是会在一个讨厌的惊喜！

Yes, when you add an int and an unsigned int, the int value gets promoted to unsigned int, so you'll be fine. Be careful that a isn't negative, however, or you'll be in for a nasty surprise!

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