Basic C programming, printf function

Question

while (i) {
    printf("Digit (%d) = %d", d, ((num2/(pow(10,(i-1))))%10));
    d++;
    i--;
}

i and d are int values declared earlier on in the function. The error I'm getting is "Operands of '%' have incompatible types 'double' and 'int'."

I keep getting this error message even after fiddling with the values.

unxnut · Accepted Answer · 2014-01-27 01:07:55Z

7

That is because pow returns a double. You will have to typecast it. Change the statement to:

printf("Digit (%d) = %d", d, ((int)(num2/(pow(10,(i-1))))%10));

answered Jan 27, 2014 at 1:07

unxnut

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timrau · Accepted Answer · 2014-01-27 01:09:51Z

3

In alternative to casting the numerator into int, you could also call fmod() to perform modular computation in terms of floating point numbers.

printf("Digit (%d) = %lf", d, fmod((num2/(pow(10.0,(i-1)))),10.0));

answered Jan 27, 2014 at 1:09

timrau

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