UNB/ CS/ David Bremner/ teaching/ old/ cs2023/ king-examples/ tabulate.c
```/*********************************************************
* From C PROGRAMMING: A MODERN APPROACH, Second Edition *
* By K. N. King                                         *
* Copyright (c) 2008, 1996 W. W. Norton & Company, Inc. *
* This program may be freely distributed for class use, *
* provided that this copyright notice is retained.      *
*********************************************************/

/* tabulate.c (Chapter 17, page 444) */
/* Tabulates values of trigonometric functions */

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

void tabulate(double (*f)(double), double first,
double last, double incr);

int main(void)
{
double final, increment, initial;

printf("Enter initial value: ");
scanf("%lf", &initial);

printf("Enter final value: ");
scanf("%lf", &final);

printf("Enter increment: ");
scanf("%lf", &increment);

printf("\n      x        cos(x)"
"\n   -------    -------\n");
tabulate(cos, initial, final, increment);

printf("\n      x        sin(x)"
"\n   -------    -------\n");
tabulate(sin, initial, final, increment);

printf("\n      x        tan(x)"
"\n   -------    -------\n");
tabulate(tan, initial, final, increment);

return 0;
}

void tabulate(double (*f)(double), double first,
double last, double incr)
{
double x;
int i, num_intervals;

num_intervals = ceil((last - first) / incr);
for (i = 0; i <= num_intervals; i++) {
x = first + i * incr;
printf("%10.5f %10.5f\n", x, (*f)(x));
}
}
```