C Language Clear screen, wait, random function

Clear Screen function

#include <conio.h>System ("CLS"); or system (CLS);wait function#include <windows.h>Sleep (5000);//wait 5 seconds, sleep () in milliseconds Random number function#include <time.h>

#include <stdlib.h> (description of NULL)      

Srand (Time (NULL)); (If the order of the random numbers generated is the same)

RAND ()%100+1;//generates 1-100 of random numbers
(General Srand and Rand are used in conjunction with the generation of pseudo-random number sequences.) The RAND function requires a system-supplied seed to generate a sequence of pseudo-random numbers before generating a random number.
Rand produces a series of random numbers based on the value of this seed. If the seed provided by the system does not change, the sequence of pseudo-random numbers generated by each call to the RAND function is the same.
Srand (unsigned seed) alters the seed value provided by the system through the parameter seed, which allows the sequence of pseudo-random numbers generated by each call to the RAND function to be different, thus achieving a true "random" meaning.
System time can often be used to change the system's seed value, which is srand, which can provide different seed values for the RAND function, resulting in a different sequence of random numbers.

C Language Clear screen, wait, random function