Test Post

CONVERSION  OF DECIMAL,HEXADECIMAL AND OCTAL
TO BINARY

PROGRAM:

#include<stdio.h>
char num[100];
void decimalto(int);
void octalto(int);
void hexto(int);
void main()
{
  int len=0,i=0,c;
  printf("MENU\n1. DECIMAL\n2. HEXADECIMAL\n3. OCTAL\n");
  printf("ENTER YOUR CHOICE\n");
  scanf("%d",&c);
  printf("\nEnter number\n");
  scanf("%s",num);
  while(num[i]!='\0')
   {
      len++;
      i++;
   }
  switch(c)
   {
      case 1: decimalto(len);
      break;
      case 2: hexto(len);
      break;
      case 3: octalto(len);
      break;
      default: printf("\n wrong choice\n");
      break;
   }
}

void decimalto(int len)
  {
     int i,a[10],c=0,d=0,flag=0,bin[20];
     for(i=0;i<len;i++)
    
      {
         if((num[i]<48) || (num[i]>57))
         flag=1;
      }
    if(flag==0)
     {
        for(i=0;i<len;i++)
         {
             a[i]=num[i]-48;
             d=d*10+a[i];
         }
    while(d!=0)
     {
         bin[c]=d%2;
        d=d/2;
         c++;
     }
   printf("\nbinary number is\n");
   for(i=c-1;i>=0;i--)
   printf("%d",bin[i]);
 }
   else
   printf("\ninvalid number\n");
 }

void octalto(int len)
  {
     int i,a[20],aa[20],j=0,n,d,k,flag=0;
     for(i=0;i<len;i++)
     a[i]=num[i]-48;
     for(i=0;i<len;i++)
      {
         if(a[i]>7)
         flag=1;
      }
     if(flag==0)
      {
         printf("\n binary number is\n");
         for(i=0;i<len;i++)
          {
          
            n=a[i];
            for(j=0;j<3;j++)
              {
                  d=n%2;
                  n=n/2;
                  aa[j]=d;
              }
           for(k=j-1;k>=0;k--)
            printf("%d",aa[k]);
      }
   }
    else
    printf("invalid number\n");
 }

void hexto(int len)
  {
     int i,a[20],aa[20],j=0,n,d,k,flag=0;
     for(i=0;i<len;i++)
      {
         if(num[i]<=57)
         a[i]=num[i]-48;
         else
         a[i]=num[i]-55;
       }
     for(i=0;i<len;i++)
      {
            if(a[i]>15)
            flag=1;
      }
     if(flag==0)
      {
          printf("\n binary number is\n");
          for(i=0;i<len;i++)
            {
               n=a[i];
               for(j=0;j<4;j++)
                 {
                    d=n%2;
                    n=n/2;
               
                  aa[j]=d;
                 }
              for(k=j-1;k>=0;k--)
              printf("%d",aa[k]);
           }
      }
      else
       printf("\ninvalid number\n");
  }

OUTPUT:

MENU
1. DECIMAL
2. HEXADECIMAL
3. OCTAL
ENTER YOUR CHOICE
1
Enter number
52
Binary number is
110100

MENU
1. DECIMAL
2. HEXADECIMAL
3. OCTAL
ENTER YOUR CHOICE
2
Enter number
A23
Binary number is 101000100011

MENU
1. DECIMAL
2. HEXADECIMAL
3. OCTAL
ENTER YOUR CHOICE
3
Enter number
7
Binary number is
111

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