/*********************************************************************************************
*
*  Description:  This program takes in a 4-bit unsigned base 2 number
*                and translates it into a decimal value.
*
*  Input:        A 4-bit unsigned base 2  number
*
*  Output:       States value of number in base 10.
*
*********************************************************************************************/

#include<stdio.h>
main()
{
int binary, decimal, threed, twod, oned;
printf("Please type in a 4-digit 2s-complement number.\n");
                              /** prompts user **/
scanf("%d", &binary);
printf("[%d]\n", binary);     /** echoes input to screen **/
decimal = binary/1000*8;   /** computes value of 2^3 position **/
threed = binary%1000;
decimal = decimal + (threed/100)*4; 
                        /** computes value of 2^2 position **/
twod = (threed%100);        
decimal =decimal + (twod/10)*2;   
                        /** computes value of 2^1 position **/
oned = twod%10;
decimal = decimal+oned;
                        /** computes value of 2^0 position **/

printf("The integer you entered (%d) converts to \n", binary);
printf("%d in base 10.\n", decimal);
                       /** prints base 10 value of integer **/
}