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C program to convert an binary number to octal

belongs to collection: C programs - Basic C Programs

mhmadesk
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2022-05-19
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Writr C program takes a binary number as input and converts it to octal. Octal numbers have the base as 8. 

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mhmadesk
2022-05-19
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C program to convert an binary number to octal - Source code

#include <stdio.h>
 
int main()
{
    long int binary_num, octal_num = 0, j = 1, rem;
 
    printf("Enter the binary number: ");
    scanf("%ld", &binary_num);
    while (binary_num != 0)
    {
        rem = binary_num % 10;
         binary_num = binary_num / 10;
        octal_num = octal_num + rem * j;
        j = j * 2;
 
    }
    printf("Equivalent octal value: %lo", octal_num);
    return 0;
}

Program Output

Enter the binary number: 10101101
Equivalent octal value: 255

Program Explanation

1. Take a binary number as input and store it in the variable binary_num.

2. Obtain the remainder and quotient of the input number by dividing it by 10.

3. Multiply the obtained remainder with variable j and increment the variable octal_num with this value.

4. Increment the variable j by multiplying it with 2 and override the variable binary_num with the quotient obtained.

5. Repeat the steps 2-4 until the variable binary_num becomes zero.

6. Print the variable octal_num as output.

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