Question

Description Develop a program (in C++) that first asks the user to input a signed number, for example 48, then converts it to binary number by using Two's Complement regulations. Do the same for the second inputted number, eg. 17. Then compute the summation of these two numbers, output the results in binary format first, then if there is an overflow, display error message; otherwise, convert the result to decimal value and show it on the screen, e.g. 48+(-17)-3. Note that there is no limit to the number of bits your program can handle. For convenience, your program can assume it is for eight bit binary numbers. All invalid inputs should be detected by your program. Your program should be user-friendly, i.e., the user can choose when to end your program
Please show that it works and show the output.

Answer 1

Answer for your question is:

#include<iostream>

using namespace std;

void display(int arr[]){

for(int x=31;x>=0;x--){

cout<<arr[x];

}

cout<<"\n";

}

void binary(int n , int arr[]){

if(n<0)n*=-1;

int x=0;

while(n){

arr[x++]=n%2;

n/=2;

}

}

void twocomp(int arr[]){

int x=0;

while(arr[x]!=1){

x++;

}

x++;

for(;x<32;x++){

if(arr[x]==0)arr[x]=1;

else if(arr[x]==1)arr[x]=0;

}

}

void Add(int num1[],int num2[],int sum[]){

int carry=0;

int s;

for(int x=0;x<32;x++){

s=num1[x]+num2[x]+carry;

sum[x]=s%2;

carry = s/2;

}

}

int main(){

int num1,num2;

cout<<"Enter First Number : ";

cin>>num1;

cout<<"Enter Second number : ";

cin>>num2;

int n1[32],n2[32],sum[32];

for(int x=0;x<32;x++){

n1[x]=0;

n2[x]=0;

sum[x]=0;

}

binary(num1,n1);

binary(num2,n2);

if(num1<0)twocomp(n1);

if(num2<0)twocomp(n2);

Add(n1,n2,sum);

if(n1[31]==0 && n2[31]==0 &&sum[31]==1)cout<<"\nOverflow\n";

else if(n1[31]==1 && n2[31]==1 &&sum[31]==0)cout<<"\nOverflow\n";

else {

cout<<"\nn1 : ";

display(n1);

cout<<"\n\n";

cout<<"\nn2 : ";

display(n2);

cout<<"\n\n";

cout<<"\nSum : ";

display(sum);

cout<<"\n";

cout<<"\n\n"<<num1<<" + "<<num2<<" = "<<num1+num2<<"\n";

}

return 0;

}

sample output of C++ program is: