Exercise 2.01

Page 36

Write a program to determine the ranges of char, short, int, and long variables, both signed and unsigned, by printing appropriate values from standard headers and by direct computation. Harder if you compute them: determine the ranges of the various floating-point types.

#include <limits.h>
#include <stdio.h>

int main()
{
	printf("--- From limits.h ---\n");
	printf("char: %d:%d\n", CHAR_MIN, CHAR_MAX);
	printf("short: %d:%d\n", SHRT_MIN, SHRT_MAX);
	printf("int: %d:%d\n", INT_MIN, INT_MAX);
	printf("long: %ld:%ld\n", LONG_MIN, LONG_MAX);
	printf("unsigned char: 0:%u\n", UCHAR_MAX);
	printf("unsigned short: 0:%u\n", USHRT_MAX);
	printf("unsigned int: 0:%u\n", UINT_MAX);
	printf("unsigned long: 0:%lu\n", ULONG_MAX);

	/* The book also suggests that you should find these by 'direct computation'. 
	 * I have no idea how to do that with the current info provided by the book, 
	 * and am hesitant to go off on a tangent figuring this out from online resources. */
}