A detailed explanation of the use of the RAND function in C language _c language

Objective

In the process of programming the algorithm, we often need to use random numbers. Since the computer is a logically based machine, it is impossible to do a real random (probably quantum computer?). ）。 So the computer generates pseudo random numbers for us to use.

We use the RAND function of the C language, which is also a pseudo random number.

The use of the RAND function in C language

1. Write header file

#include <stdlib.h> #include <stdio.h> #include <time.h>

2, the definition of the variable

void Main (void) {int i,k;

3, Srand ((unsigned) time (NULL)); /* Select Seed File/* *

4, for (i = 0; I <20;i++)/* Loop control 20 random number of generation/{K=rand ()%100;/* Store random number/printf ("k=%d\n", k); * Output random number *}}

1, this is a random function of a generation method

2, if only one, then can omit circular control

A simple demonstration is as follows:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int
main (int argc, char* * argv)
{
  //To construct the "seed" of the pseudo random number in the current time of the machine. 
  Srand ((unsigned int) time (NULL));
  int i;
  Print 10 pseudo random numbers 
  for (i = 0; i < i++) {
    
    printf ("%d", Rand ());
  }
  printf ("\ n");
  
  System ("pause");
  return 0;
}

Summarize

The above is about the use of the RAND function in C language all the content, I hope this article on the daily use of C language can help.