Program to Convert Decimal number into Binary : Number System :

Program to Convert Decimal number into Binary : Number System : Download

Logic of This Program :

1. Accept Number from User
2. As we are dividing number by 2, we have only remainders 0,1 etc
3. Take an array of remainder i. rem[20];
4. Let ,Initial elements in rem[] be Zero
5. In each iteration Store Remainder in the Array & Divide original number by 2
6. Also Count the number of remainders stored
7. To Convert into Binary Just Reverse Remainder array

Program :

#include<stdio.h>
#include<conio.h>
#include<math.h>
void dec_bin(long int num)   // Function Definition
{
long int rem[50],i=0,length=0;
while(num>0)
 {
 rem[i]=num%2;
 num=num/2;
 i++;
 length++;
 }
printf("\nBinary number : ");
     for(i=length-1;i>=0;i--)
             printf("%ld",rem[i]);
}
//================================================
void main()
{
long int num;
clrscr();
 printf("Enter the decimal number : ");
 scanf("%ld",&num);
    dec_bin(num);   // Calling function
 getch();
}

Output :

Enter the decimal number : 7 
Octal number : 111

Download Code

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