Modulo of long long int number

Question

Hi i tried out a code in c and considering that all variables in the following line of code were of "long long int",

money=(money % 1000000007)+(((2*pow(abs(a[i]-a[j]),k))%1000000007) % 1000000007);

i received an error which states that

error: invalid operands to binary % (have 'double' and 'int') money=(money % 1000000007)+(((2*pow(abs(a[i]-a[j]),k))%1000000007))) % 1000000007); ^

I did not understand what the error meant in this case because i did not use double.Could i get a brief explanation ?

Answer 1

% is an integer operator and pow() returns a double. So, you may need to use fmod or fmodf or convert everything to int.

money=(money % 1000000007)+(((2*(long long int)pow(abs(a[i]-a[j]),k))%1000000007))) % 1000000007);