Question

need c++ format

1.Check endianness on your system

. Either Big or Little Endian

2.Convert a decimal number to 2’s complement (32bits)

E.g., 5 -> 0000 0000 0000 0000 0000 0000 0000 1001   

here is the start code

*********************************************************
#include <iostream>
using namespace std;

void endianness();
void get_two_complement();
void print_menu();

int main(){
    
    int menu;
   
    do {
        print_menu(); 
        cout<< "Enter a number to select the menu: "; 
        cin >>menu;

        if(menu == 1){
            endianness();
        }
        else if (menu == 2){
            get_two_complement();
        } 
        else if (menu == 0){
            break;
        }   
        else {
           printf("wrong input!!!\n");
        }

        print_menu();
        cout<< "Enter a number to select the menu: "; 
        cin >> menu;
     
    }while (menu !=0);
    cout<< "Bye !!!" << endl;
    exit(0);
}

void endianness(){
    cout << "My system uses the following endianness..." << endl;
    //write the code here
    //print either little or big below




   //end of code  
} 

void get_two_complement(){
    int number;
    cout << "Input the number to convert two's complement: ";
    cin >> number;
    cout << number << "'s two's complement is: "; 
    //write the code here



   
    //end of code 
    cout << endl << "[format]:" << endl;
    cout << number << "'s two's complement is: "; 
    cout << "0000 0000 0000 0000 0000 0000 0000 0000"<< endl;
} 

void print_menu(){

    cout << "********************************" << endl; 
    cout << "****    Homwwork 1: Menu    ****" << endl;
    cout << "*  1. Check endianness         *" << endl;
    cout << "*  2. Convert two's complement *" << endl;
    cout << "*  0. Exit the program         *" << endl;
    cout << "********************************" << endl; 

}

Answer 1

#include <iostream>
using namespace std;

void endianness();
void get_two_complement();
void print_menu();

int main(){

int menu;

do {
print_menu();
cout<< "Enter a number to select the menu: "<<endl;
cin >>menu;

if(menu == 1){
endianness();
}
else if (menu == 2){
get_two_complement();
}
else if (menu == 0){
break;
}
else {
cout<<"wrong input!!!"<<endl;
}

print_menu();
cout<< "Enter a number to select the menu: ";
cin >> menu;

}while (menu !=0);
cout<< "Bye !!!" << endl;
return 0;
}

void endianness(){
cout << "My system uses the following endianness..." << endl;
unsigned int x = 5;
char *q = 0;
q = (char*)&x; //A char pointer is assigned to point to the first (least-significant) byte of the integer value(i.e. x).
if (*q == 5) //If the first byte of the integer is having value equal to 5, then the system is Little-Endian. Otherwise the system is Big-Endian.
cout << "Little Endian" << endl;
else
cout<< "Big Endian" << endl;
}

void get_two_complement(){
int number;
cout << "Input the number to convert two's complement: ";
cin >> number;
cout << number << "'s two's complement is: ";

int a[32];int i;
//converting decimal into binary format
for( i =0; i<32; i++){
a[i]=0;
}
for(i=31; number >0; i--) {
a[i]=number%2;
number= number/2;
}

//traverse the array until we get first 1 from right.
for (i = 31 ; i >= 0 ; i--)
if (a[i] == 1)
break;

// If there exists no '1', concatenate 1 at the starting to get the 2's complement.
if (i == -1) {
cout<< "1 0000 0000 0000 0000 0000 0000 0000 0000"<<endl; // 2's complement of '0000...0000' is '10000..0000'
return ;
}

// flip the values after the position of first '1'
for (int k = i-1 ; k >= 0; k--)
{
if (a[k] == 1)
a[k] = 0;
else
a[k] = 1;
}

int count=0;
//Displaying the 2's complement.
for (i = 0 ; i < 32 ; i++){
cout << a[i];
count++;
if(count==4){
count=0;
cout<<"\t";
}
}
cout<<endl;
}

void print_menu(){

cout << "********************************" << endl;
cout << "**** Homwwork 1: Menu ****" << endl;
cout << "* 1. Check endianness *" << endl;
cout << "* 2. Convert two's complement *" << endl;
cout << "* 0. Exit the program *" << endl;
cout << "********************************" << endl;

}