How to do random in C?
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I want to know how to do random numbers in C. Is there a specific random command? Is it math.random like in Lua?
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rand()%PERCENTAGE OF RANDOMIZATIONSo, the code:else if ((r&0xFF)==PT_GUNP && 15>(rand()%1000))
part_change_type(r>>8,x+rx,y+ry,PT_DUST);
Within neut.c will always turn the GUNP to DUST on contact with NEUT. -
@Neospector (View Post)
well, not exactly, that number is not a percentage.
the % symbol in C is the modulus operator, which divides a number but returns the remainder, and not the result.
4%100 is 4, 106%100 is 6.
the rand() function picks a random number 0-rand_max(a very high number) , using % with that ends up getting you a number bewteen 0-x , x being the number you use, 1000 in that example. Which is then being compared to 15, so in that case, it has a 15/1000 chance to become DUST. -
@cracker64 (View Post)
rand() gives you a random number from 0 - RAND_MAX (which is dependent on the compiler -- it's 32767 on mine).
(Just saying....) -
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Does Rand always give an integer value or does it sometimes give a value with decimal (float or double type value) like 5.43582?
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@Videogamer555 (View Post)
It's always an integer.
Basically, it's declared in stdlib.h likeint rand(void);So it'll always return an integer. (from 0 - RAND_MAX).
