ex26.c++

/**
26. 
Write a function to read in an integer and print the representation of the number
using the sign and magnitude representation scheme using 8 bits. The program should
check for overflow/under flow conditions. The left most bit is to be used as the sign
 bit.
*/
#include<iostream>
#include<cmath>
using namespace std;
void signed_bit_represenation(int dec_num)
{
	int bin[8] = {0};
	bool flag_overflow = false;

	//sign bit set
	int sign_bit = bin[0] = (dec_num < 0)? 1:0;  //as lsb is the sign bit


    //only magnitude required
	int n = fabs(dec_num);
	int i = 8; 
    while (n > 0) { 
          // storing remainder in binary array 
        bin[i] = n % 2; 
        n = n / 2; 
        i--; 
    }


    //checking for overflow condition
    if(sign_bit == bin[0])
       {
         //display the binary number
         for(int j=0; j<8; j++)
         {
    	 cout<<bin[j];
        } 
       cout<<"\n";
       }
    else cout<<"overflow occoured!!!";
}

int main(int argc, char const *argv[])
{
	int n;
	cout<<"Input a number :";
	cin>>n;
	cout<<"The signed-magnitude representation of `"<<n<<"` is :";
	signed_bit_represenation(n);
	return 0;
}