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How can I add precision to drand48() in C++?
I am using it in a function like:
double x = drand48()%1000+1;
to generate numbers below 1000.
But then I get this error:
error: invalid operands of types ‘double’ and ‘int’ to binary ‘operator%’
This does not happen when I use:
double x = rand()%1000+1;
Why and what is the difference between rand() and drand48()?
drand48 returns a double in the range of 0.0 to 1.0. You want to multiply that by the range you’re looking to generate.
double x = drand48() * 1000.0