Practice Program






  • Program of Converting Decimal to Hexadecimal.

    • Solution: through While loop 
    void main()
{
    int i,j=0,n;
    int a[30];

    printf("Enter the decimal number:");
    scanf("%d",&n);


    while(n!=0)
    {
        a[j] = n%16;//storing the remainder at every iteration as element in an array
        n = n/16;//at every iteration we are dividing 'n' with 2
           //and storing its quotient as a new value in of  'n' variable.
     j++;
    }
     j = j-1;
     printf("Hexadecimal Number is: ");
    while(j>=0) //printing the hex form of  a number. 
    {   
         if(a[j] == 10)
           printf("%c",'A');
        if(a[j] == 11)
           printf("%c",'B');
        if(a[j] == 12)
           printf("%c",'C');
        if(a[j] == 13)
           printf("%c",'D');
        if(a[j] == 14)
           printf("%c",'E');
        if(a[j] == 15)
           printf("%c",'F');
        else
         printf("%d",a[j]);
        j--;
    }

}

    Output1
    Enter the decimal number: 12

    Hexadecimal is: C

    Output2
    Enter the decimal number: 32

    Hexadecimal Number is: 20

    Output3
    Enter the decimal number: 44

    Hexadecimal Number is: 2C



    Solution: from do-while loops 
    void main()
{
    int i,j=0,n;
    int a[30];

    printf("Enter the decimal number:");
    scanf("%d",&n);


   do
    {
        a[j] = n%16;//storing the remainder at every iteration as element in an array
        n = n/16;//at every iteration we are dividing 'n' with 2
           //and storing its quotient as a new value in of  'n' variable.
     j++;
    }while(n!=0);
     j = j-1;
      printf("Octal Number is: ");
     do
    //printing the hexa decimal form of  a number. 
    {   
         if(a[j] == 10)
           printf("%c",'A');
        if(a[j] == 11)
           printf("%c",'B');
        if(a[j] == 12)
           printf("%c",'C');
        if(a[j] == 13)
           printf("%c",'D');
        if(a[j] == 14)
           printf("%c",'E');
        if(a[j] == 15)
           printf("%c",'F');
        else
        printf("%d",a[j]);
        j--;
    }while(j>=0);

}




    defining a function 'do_hex' which will print decimal number in a Hexadecimal form. 
    void do_hex(int n)
{
     int j=0;
    int a[10];




    while(n!=0)
    {
        a[j] = n%16;//storing the remainder at every iteration as element in an array
        n = n/16;//at every iteration we are dividing 'n' with 2
           //and storing its quotient as a new value in of  'n' variable.
     j++;
    }
     j = j-1; //decrementing the value of j by 1,
        //because at current j value there is a garbage value.

    while(j>=0)
    {
        printf("%d",a[j]);
        j--;
    }
}

    Using above define function 'do_hex()': 
    void main()
{
printf("Hexadecimal Number is:` ");
do_hex(12);
}

    Output1
    Hexadecimal Number is: C

    Using above define function 'do_hex()': 
    void main()
{
printf("Hexadecimal Number is: ");
do_hex(32);
}

    Output2
    Hexadecimal Number is: 20

    Using above define function 'do_hex()': 
    void main()
{
printf("Hexadecimal Number is: ");
do_hex(44);
}

    Output3
    Hexadecimal Number is: 2C