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C program to decimal to octal number using the math library function

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YasminRadwan26
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2022-06-22
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We can convert decimal to octal using the pow library function declared in math.h header file. Let’s see the code.

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YasminRadwan26
2022-06-22
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#include <stdio.h>
//typedef to avoid long name
typedef unsigned long long ULLINT;
// Function to return the octal
// equivalent of decimal value num
ULLINT decimalToOctal(ULLINT num)
{
    // To store the octal number
    ULLINT binNum = 0;
    int cnt = 0;
    while (num != 0)
    {
        int rem = num % 8;
        ULLINT c = pow(10, cnt);
        binNum += rem * c;
        num /= 8;
        // Count used to store exponent value
        cnt++;
    }
    return binNum;
}
int main()
{
    //num for decimal number
    ULLINT num;
    printf("Enter decimal number: ");
    scanf("%lld", &num);
    //Called function
    printf("%lld",decimalToOctal(num));
    return 0;
}

Output:

Enter a decimal number: 74
112

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