#include <ansidecl.h> #include <stdio.h> #include <math.h> #include <stdlib.h> #include <errno.h> #include <string.h> void print_trig_stuff __P ((void)); int DEFUN_VOID(main) { 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; } #define PI 3.14159265358979323846264338327 const double RAD[5] = { 0, PI/2, PI, (3*PI)/2, 2*PI }; const int DEG[5] = { 0, 90, 180, 360 }; #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 DEFUN_VOID (print_trig_stuff) { 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); }