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C > Conversions Code Examples

This program takes a octal number as input and converts it into decimal number.

This program takes a octal number as input and converts it into decimal number.

- Take the octal number as input and store it in the variable octal.
- Initialize the variables decimal and j to zero.
- Obtain the remainder and quotient of the octal number. Multiply the remainder by powers of 8 using function pow(8, j++), add this value to the variable decimal and store it in the variable decimal.
- Override the variable octal with quotient.
- Repeat the steps 3 and 4 with the quotient obtained until the quotient becomes zero.
- Print the variable decimal as output.

    #include <stdio.h>

    #include <math.h>

    int main()

    {

        long int octal, decimal = 0;

        int j = 0;

        printf("Enter any octal number: ");

        scanf("%ld", &octal);

        while (octal != 0)

        {

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

            octal = octal / 10;

        }

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

        return 0;

    }

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