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#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
void print_trig_stuff __P ((void));
int
main (void)
{
const char str[] = "123.456";
double x,h,li,lr,a,lrr;
x = atof (str);
printf ("%g %g\n", x, pow (10.0, 3.0));
x = sinh(2.0);
printf("sinh(2.0) = %g\n", x);
x = sinh(3.0);
printf("sinh(3.0) = %g\n", x);
h = hypot(2.0,3.0);
printf("h=%g\n", h);
a = atan2(3.0, 2.0);
printf("atan2(3,2) = %g\n", a);
lr = pow(h,4.0);
printf("pow(%g,4.0) = %g\n", h, lr);
lrr = lr;
li = 4.0 * a;
lr = lr / exp(a*5.0);
printf("%g / exp(%g * 5) = %g\n", lrr, a, lr);
lrr = li;
li += 5.0 * log(h);
printf("%g + 5*log(%g) = %g\n", lrr, h, li);
printf("cos(%g) = %g, sin(%g) = %g\n", li, cos(li), li, sin(li));
x = drem(10.3435,6.2831852);
printf("drem(10.3435,6.2831852) = %g\n", x);
x = drem(-10.3435,6.2831852);
printf("drem(-10.3435,6.2831852) = %g\n", x);
x = drem(-10.3435,-6.2831852);
printf("drem(-10.3435,-6.2831852) = %g\n", x);
x = drem(10.3435,-6.2831852);
printf("drem(10.3435,-6.2831852) = %g\n", x);
printf("x%8.6gx\n", .5);
printf("x%-8.6gx\n", .5);
printf("x%6.6gx\n", .5);
{
double x = atof ("-1e-17-");
printf ("%g %c= %g %s!\n",
x,
x == -1e-17 ? '=' : '!',
-1e-17,
x == -1e-17 ? "Worked" : "Failed");
}
print_trig_stuff ();
return 0;
}
const double RAD[5] = { 0, M_PI/2, M_PI, (3*M_PI)/2, 2*M_PI };
#define PRINT_IT_1_ARG(_func, _arg, _value) \
(_value) = (_func) ((_arg)); \
if (errno) { \
errno = 0; \
printf ("%s = ERROR %s\n", #_func, strerror (errno)); \
} else \
printf ("%s(%g) = %g\n", #_func, _arg, (_value)); \
#define PRINT_IT_2_ARG(_func, _arg1, _arg2, _value) \
(_value) = (_func) ((_arg1),(_arg2)); \
if (errno) { \
errno = 0; \
printf ("%s = ERROR %s\n", #_func, strerror (errno)); \
} else \
printf ("%s(%g, %g) = %g\n", #_func, _arg1, _arg2, (_value)); \
void
print_trig_stuff(void)
{
double value, arg1, arg2;
int i;
puts ("\n\nMath Test");
errno = 0; /* automatically reset on error condition */
for (i=0; i<4; i++)
{
PRINT_IT_1_ARG (sin, RAD[i], value);
PRINT_IT_1_ARG (cos, RAD[i], value);
PRINT_IT_1_ARG (tan, RAD[i], value);
PRINT_IT_1_ARG (asin, RAD[i], value);
PRINT_IT_1_ARG (acos, RAD[i], value);
PRINT_IT_1_ARG (atan, RAD[i], value);
PRINT_IT_2_ARG (atan2, RAD[i], -RAD[i % 4], value);
}
arg1 = 16;
arg2 = 3;
PRINT_IT_1_ARG (exp, arg1, value);
PRINT_IT_1_ARG (log, arg1, value);
PRINT_IT_1_ARG (log10, arg1, value);
PRINT_IT_2_ARG (pow, arg1, arg2, value);
PRINT_IT_1_ARG (sqrt, arg1, value);
PRINT_IT_1_ARG (cbrt, arg1, value);
PRINT_IT_2_ARG (hypot, arg1, arg2, value);
PRINT_IT_1_ARG (expm1, arg1, value);
PRINT_IT_1_ARG (log1p, arg1, value);
PRINT_IT_1_ARG (sinh, arg1, value);
PRINT_IT_1_ARG (cosh, arg1, value);
PRINT_IT_1_ARG (tanh, arg1, value);
PRINT_IT_1_ARG (asinh, arg1, value);
PRINT_IT_1_ARG (acosh, arg1, value);
PRINT_IT_1_ARG (atanh, arg1, value);
}
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