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kolibrios/programs/develop/ktcc/trunk/libctest/float2.c

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C
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#include <stdio.h>
#include <math.h>
main()
{
int i;
for (i = 0; i < 10; i++)
{
printf("------------------------------------------------------\n");
printf ( "remainder of 5.3 / 2 is %f\n", remainder (5.3,2) );
printf ( "remainder of 18.5 / 4.2 is %f\n", remainder (18.5,4.2) );
//remainder of 5.3 / 2 is -0.700000
//remainder of 18.5 / 4.2 is 1.700000
printf ( "fmod of 5.3 / 2 is %f\n", fmod (5.3,2) );
printf ( "fmod of 18.5 / 4.2 is %f\n", fmod (18.5,4.2) );
// fmod of 5.3 / 2 is 1.300000
// fmod of 18.5 / 4.2 is 1.700000
double param, fractpart, intpart, result;
int n;
param = 3.14159265;
fractpart = modf (param , &intpart);
printf ("%f = %f + %f \n", param, intpart, fractpart);
//3.141593 = 3.000000 + 0.141593
param = 0.95;
n = 4;
result = ldexp (param , n);
printf ("%f * 2^%d = %f\n", param, n, result);
//0.950000 * 2^4 = 15.200000
param = 8.0;
result = frexp (param , &n);
printf ("%f = %f * 2^%d\n", param, result, n);
//8.000000 = 0.500000 * 2^4
param = 50;
result = frexp (param , &n);
printf ("%f = %f * 2^%d\n", param, result, n);
}
}