C Program to Find the Range of Basic Data Types

/*
 * C Program to Print the Range of Datatypes
 */
#include <stdio.h>
#define SIZE(x) sizeof(x)*8
 
void signed_one(int);
void unsigned_one(int);
 
void main()
{
    printf("range of int");
    signed_one(SIZE(int));
 
    printf("\nrange of unsigned int");
    unsigned_one(SIZE(unsigned int));
 
    printf("\n\nrange of char");
    signed_one(SIZE(char));
 
    printf("\nrange of unsigned char");
    unsigned_one(SIZE(unsigned char));
 
    printf("\n\nrange of short");
    signed_one(SIZE(short));
 
    printf("\nrange of unsigned short");
    unsigned_one(SIZE(unsigned short));
}
 
/* RETURNS THE RANGE SIGNED*/
void signed_one(int count)
{
    int min, max, pro;
    pro = 1;
    while (count != 1)
    {
        pro = pro << 1;
        count--;
    }
    min = ~pro;
    min = min + 1;
    max = pro - 1;
    printf("\n%d to %d", min, max);
}
 
/* RETURNS THE RANGE UNSIGNED */
void unsigned_one(int count)
{
    unsigned int min, max, pro = 1;
 
    while (count != 0)
    {
        pro = pro << 1;
        count--;
    }
    min = 0;
    max = pro - 1;
    printf("\n%d to %d", min, max);
}

Output

range of int
-2147483648 to 2147483647
range of unsigned int
0 to -1
 
range of char
-128 to 127
range of unsigned char
0 to 255
 
range of short
-32768 to 32767
range of unsigned short
0 to 65535