INTERVIEW QUESTIONS C FUNCTIONS IN C DETAILS

Question: what is the difference between the functions rand(),random(),srand() and randomize()?

Answer:

Source: CoolInterview.com

rand():Rand uses a multiplicative congruential random number generator with period 232 to return successive pseudo-random numbers in the range 0 to rand-max.
Random():Random returns a random number between 0 and (num-1).random(num) is a macro defined in stdlib.h.
Randomize():Randomize initializes the random number generator with a random value.Because randomize is implemented as a macro that calls the time function prototyped in time.h,you should include time.h when you use this module.
Srand():the random number generator is reinitialized by calling srand with an argument value of 1.the generator can be set to a new starting point by calling srand with a given seed number. Source: CoolInterview.com

RAND: Rand uses a multiplicative congruential random number generator with period232 to return successive pseudo-random numbers in the range 0 to RAND_MAX.

Return Value: Rand returns the generated pseudo-random number.

RANDOM(): Random returns a random number between 0 and (num-1).random(num) is a macro defined in STDLIB.H.




RANDOMIZE(): Randomize initializes the random number generator with a random value. Because randomize is implemented as a macro that calls the time function prototyped in TIME.H, you should include TIME.H when you use this routine




SRAND(): The random number generator is reinitialized by calling srand with an argument value of 1.The generator can be set to a new starting point by calling srand with a given seed number.



Source: CoolInterview.com

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