c++ float 取绝对值

要计算浮点数c的绝对值，可以使用C语言的math.h头文件中的abs()函数。在你提供的例子中，使用了cmath头文件，该头文件也包含了abs()函数。因此，可以使用abs(c)来计算c的绝对值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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