08.09.08 some characters

最新推荐文章于 2022-01-08 15:26:18 发布

原创最新推荐文章于 2022-01-08 15:26:18 发布 · 287 阅读

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本文介绍了三个基本数学函数的应用实例：幂运算函数pow用于计算x的y次方；绝对值函数fabs用于计算浮点数的绝对值；平方根函数sqrt用于求解数值的平方根。这些函数常见于C/C++等编程语言的数学库中。

Some characters as follows:

pow

Calculates x raised to the power of y.

#include <math.h>
#include <stdio.h>

void main( void )
{
double x = 2.0, y = 3.0, z;

z = pow( x, y );
printf( "%.1f to the power of %.1f is %.1f/n", x, y, z );
}

Output

2.0 to the power of 3.0 is 8.0

fabs

Calculates the absolute value of the floating-point argument.

#include  <stdio.h>
#include  <math.h>
#include  <stdlib.h>

void main( void )
{
   int    ix = -4, iy;
   long   lx = -41567L, ly;
   double dx = -3.141593, dy;

   iy = abs( ix );
   printf( "The absolute value of %d is %d/n", ix, iy);

   ly = labs( lx );
   printf( "The absolute value of %ld is %ld/n", lx, ly);

   dy = fabs( dx );
   printf( "The absolute value of %f is %f/n", dx, dy );
}

Output
The absolute value of -4 is 4
The absolute value of -41567 is 41567
The absolute value of -3.141593 is 3.141593
 
sqrt
Calculates the square root.
 
Ex:
answer = sqrt( question );
 
 
The book <<ObjectARX>> is not very good I think .