这里我们将看到 c 或 c++ 中的 nextafter() 和 nextforward() 函数的效果。这些函数存在于 math.h 或 cmath 库中。
如果函数类似于 nextafter(a, b) 和 nextforward(a, b)。这些函数用于在 b 方向上查找 a 之后的下一个可表示值。 nextforward() 有更精确的第二个参数 b。
示例#include <stdio.h>#include <math.h>main () { //the nextafter function() printf ("smallest representable number after 0 towards 1 : %e\n", nextafter(0.0, 1.0)); printf ("largest representable number before -1 towards 0 :%e\n", nextafter(0.0, -1.0)); printf ("largest +ve representable number after 0.8 : %e\n", nextafter(0.8, 0.0)); // using nexttoward printf("\n"); printf ("smallest representable number after 0 towards 1 : %e\n", nexttoward(0.0, 1.0)); printf ("largest representable number before -1 towards 0 : %e\n", nexttoward(0.0, -1.0)); printf ("largest +ve representable number after 0.8 : %e\n", nexttoward(0.8, 0.0));}
输出smallest representable number after 0 towards 1 : 4.940656e-324largest representable number before -1 towards 0 :-4.940656e-324largest +ve representable number after 0.8 : 8.000000e-001smallest representable number after 0 towards 1 : 4.940656e-324largest representable number before -1 towards 0 : -4.940656e-324largest +ve representable number after 0.8 : 8.000000e-001
以上就是在c/c++中，nextafter()和nexttoward()的翻译如下：的详细内容。