C program for hexadecimal to binary conversion

C program for hexadecimal to binary conversion

#include<stdio.h>

#define MAX 1000

int main(){

    char binaryNumber[MAX],hexaDecimal[MAX];

    long int i=0;

    printf("Enter any hexadecimal number: ");

    scanf("%s",hexaDecimal);

    printf("\nEquivalent binary value: ");

    while(hexaDecimal[i]){

         switch(hexaDecimal[i]){

             case '0': printf("0000"); break;

             case '1': printf("0001"); break;

             case '2': printf("0010"); break;

             case '3': printf("0011"); break;

             case '4': printf("0100"); break;

             case '5': printf("0101"); break;

             case '6': printf("0110"); break;

             case '7': printf("0111"); break;

             case '8': printf("1000"); break;

             case '9': printf("1001"); break;

             case 'A': printf("1010"); break;

             case 'B': printf("1011"); break;

             case 'C': printf("1100"); break;

             case 'D': printf("1101"); break;

             case 'E': printf("1110"); break;

             case 'F': printf("1111"); break;

             case 'a': printf("1010"); break;

             case 'b': printf("1011"); break;

             case 'c': printf("1100"); break;

             case 'd': printf("1101"); break;

             case 'e': printf("1110"); break;

             case 'f': printf("1111"); break;

             default:  printf("\nInvalid hexadecimal digit %c ",hexaDecimal[i]); return 0;

         }

         i++;

    }

    return 0;

}

Sample output:

Enter any hexadecimal number: 2AD5

Equivalent binary value: 0010101011010101

---

Algorithm:

Hexadecimal to binary conversion method:

To convert or change the hexadecimal number to binary number replace the each octal digits by a binary number using hexadecimal to binary chart.

Hexadecimal	Binary
0	0000
1	0001
2	0010
3	0011
4	0100
5	0101
6	0110
7	0111
8	1000
9	1001
A	1010
B	1011
C	1100
D	1101
E	1110
F	1111

Hexadecimal to binary table

Hexadecimal to binary conversion examples:

For example we want to convert or change hexadecimal number 65B2 to binary. For this we will replace each hexadecimal digit to binary values using the above table:

Hexadecimal number:  6    5    B    2

Binary values:     0110 0101 1011 0010

So (65B2)₁₆ = (0110010110110010)₂

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C code to convert octal number to decimal number

C code to convert octal number to decimal number

#include<stdio.h>

#include<math.h>

int main(){

   

    long int octal,decimal =0;

    int i=0;

    printf("Enter any octal number: ");

    scanf("%ld",&octal);

    while(octal!=0){

         decimal = decimal + (octal % 10) * pow(8,i++);

         octal = octal/10;

    }

    printf("Equivalent decimal value: %ld",decimal);

   return 0;

}

Sample output:

Enter any octal number: 346

Equivalent decimal value: 230

C program to change octal to decimal

#include<stdio.h>

int main(){

   

    long int octalNumber;

    printf("Enter any octal number: ");

    scanf("%o",&octalNumber);

    printf("Equivalent decimal number is: %d",octalNumber);

    return 0;

}

Sample output:

Enter any octal number: 17

Equivalent decimal number is: 15

---

Algorithm:

Octal to decimal conversion method:

To convert an octal number to decimal number multiply each digits separately of octal number from right side by  8^0,8^1,8^2,8^3 … respectively and then find out the sum of them.

Octal to decimal conversion examples:

For example we want to convert octal number 3401 to decimal number.

Step 1: 1 * 8 ^0 = 1*1 =1

Step 2: 0 * 8 ^1 = 0*8 =0

Step 3: 4 * 8 ^2 = 4*64 =256

Step 4: 3 * 8 ^3 = 3*512 =1536

Sum= 1 + 0 + 256 + 1536 = 1793

So, (3401)₈ = (1793)₁₀

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C program to convert binary to octal

C program to convert binary to octal

#include<stdio.h>

#define MAX 1000

int main(){

   

    char octalNumber[MAX];

    long int i=0;

    printf("Enter any octal number: ");

    scanf("%s",octalNumber);

    printf("Equivalent binary value: ");

    while(octalNumber[i]){

        switch(octalNumber[i]){

             case '0': printf("000"); break;

             case '1': printf("001"); break;

             case '2': printf("010"); break;

             case '3': printf("011"); break;

             case '4': printf("100"); break;

             case '5': printf("101"); break;

             case '6': printf("110"); break;

             case '7': printf("111"); break;

             default:  printf("\nInvalid octal digit %c ",octalNumber[i]); return 0;

    }

    i++;

 }

    return 0;

}

Sample output:

Enter any octal number: 123

Equivalent binary value: 001010011

---

Algorithm:

Octal to binary conversion method:

To convert or change the octal number to binary number replace the each octal digits by a binary number using octal to binary chart.

Octal	Binary
0	000
1	001
2	010
3	011
4	100
5	101
6	110
7	111

Octal to binary table

Octal to binary conversion examples:

For example we want to convert or change octal number 65201 to decimal. For this we will replace each octal digit to binary values using the above table:

Octal number:   6   5   2   0   1

Binary values: 110 101 010 000 001

So (65201)₈ = (110101010000001)₂

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decimal to octal converter

C code for decimal to octal converter

#include<stdio.h>

int main(){

  long int decimalNumber,remainder,quotient;

  int octalNumber[100],i=1,j;

  printf("Enter any decimal number: ");

  scanf("%ld",&decimalNumber);

  quotient = decimalNumber;

  while(quotient!=0){

      octalNumber[i++]= quotient % 8;

      quotient = quotient / 8;

  }

  printf("Equivalent octal value of decimal number %d: ",decimalNumber);

  for(j = i -1 ;j> 0;j--)

      printf("%d",octalNumber[j]);

  return 0;

}

Sample output:

Enter any decimal number: 50

Equivalent octal value of decimal number 50: 62

2. Easy way to convert decimal number to octal number in c

#include<stdio.h>

int main(){

  long int decimalNumber;

  printf("Enter any decimal number : ");

  scanf("%d",&decimalNumber);

  printf("Equivalent octal number is: %o",decimalNumber);

  return 0;

}

Sample output:

Enter any decimal number: 25

Equivalent octal number is: 31

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Type Casting

Type Casting

Assigning a value of one type to a variable of another type is known as Type Casting.
Example :

int x = 10;
byte y = (byte)x;

In Java, type casting is classified into two types,

• Widening Casting(Implicit)

• Narrowing Casting(Explicitly done)

---

Widening or Automatic type converion

Automatic Type casting take place when,

• the two types are compatible
• the target type is larger than the source type

Example :

public class Test
{
    public static void main(String[] args)
    {
      int i = 100; 
      long l = i; //no explicit type casting required  
      float f = l; //no explicit type casting required  
      System.out.println("Int value "+i);
      System.out.println("Long value "+l);
      System.out.println("Float value "+f);
    }
    
}

Output :

Int value 100
Long value 100
Float value 100.0

---

Narrowing or Explicit type conversion

When you are assigning a larger type value to a variable of smaller type, then you need to perform explicit type casting.
Example :

public class Test
{
    public static void main(String[] args)
    {
      double d = 100.04;  
      long l = (long)d;  //explicit type casting required  
      int i = (int)l; //explicit type casting required  
      
      System.out.println("Double value "+d);
      System.out.println("Long value "+l);
      System.out.println("Int value "+i);
     
    }
    
}

Output :

Double value 100.04
Long value 100
Int value 100

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