thanks for helping me...
im using c++ language...
how can you convert decimal to binary..
should i divide it? can you give me a hint for what code should i use...thanks

The same way I showed you in your other thread, only now use an interger as input:

``````int a = 17;
std::cout << std::bitset<CHAR_BIT>( a ) << std::endl;``````

Will give 00010001 as output (17 binary)

If you're looking to create a sequence of ones and zeros, you need to do some division and modulus operations.
Look here for some example of the process. You can do a 'net …

Members,

Look at thread's start date. It was started on Dec 10th, 2007. Please do not resurrect old threads. By doing so you run the risk of confusing current posters.

## All 11 Replies

The same way I showed you in your other thread, only now use an interger as input:

``````int a = 17;
std::cout << std::bitset<CHAR_BIT>( a ) << std::endl;``````

Will give 00010001 as output (17 binary)

If you're looking to create a sequence of ones and zeros, you need to do some division and modulus operations.
Look here for some example of the process. You can do a 'net search and find many more examples.

``````#include<iostream>
using namespace std;
int bin(int num);
int main()
{
cout<<"Enter a binary number ";
int num;
cin>>num;
cout<<endl<<endl;
bin(num);
cout<<endl<<endl;
system("PAUSE");
return 0;
}
int bin(int num)
{
int a;
int i;
i=0;
int r;
int d;
int b;
int j;
j= 0;
cout<<"Binary is : ";
while(num>0)
{
r=num%2;
a[j]=r;
d=num/2;
b=num;
num=d;
j++;
}
while(j>=0)
{
cout<<a[j];
j--;
}
}``````
commented: Don't bump old threads -1
commented: Bad code and 3 years late. -2

Try dis.....

``````#include<iostream.h>
#include<malloc.h>
class d2b
{
public:
int dec2bin(int *p)
{
int a,b,c=1,d=0;
while (*p!=0)
{
a = *p%2;
b = a * c;
d = d + b;
*p = *p/2;
c = c * 10;
}
return d;
}
};
void main()
{
d2b db;
int *n,x,y;
n = (int*)malloc(sizeof(int));
cout<<"Enter the decimal number: ";
cin>>*n;
y = *n;
x = db.dec2bin(n);
cout<<"The binary conversion of "<<y<<" is "<<x<<endl;
}``````
commented: Did you read the post above? -1
``````#include<stdio.h>

int pow1(int,int);
void main(char* argv)
{
int i=0,n=0,j=0;
int bin=0;
printf("Enter a number \n");
scanf("%d",&n);
for(i=0;n>0;i++)
{
j=n%2;
bin=bin+j * pow1(10,i);
n/=2;
}
printf("The binary number is %d \n",bin);
}

int pow1(int a , int b)
{
int i=0;
int sum=1;
for(i=0;i<b;i++)
sum*=a;

return sum;
}
``````
commented: Erm sure... -1

Members,

Look at thread's start date. It was started on Dec 10th, 2007. Please do not resurrect old threads. By doing so you run the risk of confusing current posters.

``````int decimal,remender,sum=0,i=1;
cout<<"enter your integer and decimal number"<<endl;
cin>>decimal;
do{
remender=decimal%2;
sum=sum+(i*remender);
decimal=decimal/2;
i=i*10;
}
while(decimal>0)
cout<<"the binary number is="<<sum<<endl;
``````
commented: SO you decided to ignore the last post? -2
``````#include<iostream.h>
#include<conio.h>

class conversion
{
private:
int n,i,p,q;
int arr,ar,a;
public:

void input()

{
cout<<"how many binary nos you want to enter?   ";
cin>>n;
cout<<endl<<endl;
p=0;
n--;
for(i=n;i>=0;i--)
{cout<<"enter binary no    ";
cin>>arr[i];
p++;}
}

void func()

{
n=1;
for(i=0;i<=p;i++)
{ar[i]=n;
n=n*2;}

}

void output()

{  p--;
for(int j=0;j<=p;j++)
{
a[j]=arr[j]*ar[j];
}
q=0;
for(int j=0;j<=p;j++)
q=q+a[j];
cout<<endl<<endl;
cout<<"decimal conversion "<<q;
}
};

void main()

{
conversion c;
c.input();
c.func();
c.output();

getch();
}
``````

enjoys guys

``````template<class _T>
const char * dec2bin(_T dec)
{
static char szret;
int ch = sizeof(dec) * 8;
memset(szret, 0, ch+1);
char * ptr = szret;
for( int i=0;i<ch;i++ )
ptr[ch-1-i] = '0' + (dec >> i & 1);
return ptr;
}
``````

I've tried before posting this. dec2bin function accepts any integer (BYTE, short, long, __int64). Hope this helps.

How bout dis???

``````#include<iostream.h>
#include<conio.h>
#include<math.h>
void main()
{
clrscr();
int a,i=0,dec,bin,j,k;
cout<<"Enter the number:\n";
cin>>dec;
int quotient=dec;
do
{  a[i]=quotient%2;
i++;
quotient=quotient/2;

}  while(quotient!=0);
int strlen=i;
cout<<endl;
for(i=strlen-1;i>=0;i--)
{  cout<<a[i];
}
getch();
}
``````
``````#include <iostream>

int main () {
int b,m,n;
std::string s;
std::cout<<"Input decimal number.\nInput \"0\" = end.\n\n";
do  {
std::cout<<"dec: ";
std::cin>>n;
m=n;
std::cout <<"hex: "<< std::hex << n << '\n';
std::cout <<"oct: " << std::oct << n << '\n';
while(n>0){
s+=(n%2)+48;
n/=2;
}
std::cout<<"bin: ";
while(s.size()>0){ std::cout<<s[(s.size()-1)]; s=s.substr(0,(s.size()-1)); }
std::cout<<"\n\n";
s="";
}
while(m>0);
return 0;
}
``````
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