How to use the random function in C?

srand(int) is used to set the seed, and then returns a random value each time rand().

It's better to have a different seed every time, otherwise you'll get the same series of pseudo-random numbers every time, usually making the seed relevant to the current time, for example.

srand((unsigned)time(0));

On the first floor, the ** inside the c comes to randomize and randomize ???

c initializes the random seed is srand(int), and then rand() returns a random value, ranging from 0 to 32767

random()

This function can't be used under VC, it must be used on turbo, you can only use the RAND function.

First in. srand to get the random number, if you want to get a random number between 0 and 100z, you can random()%100

Random, in C, means random number generator. Usage:

intrandom(int

num);Examples:

#include

intmain(void);

randomize();

printf("number:%d",random(100));* means to take a number between 0 and 99 and output *

return

Function name: random

Function: Random number generator.

Usage: int random(int num);

Example: include

#include

#include

prints a random number in the range 0 to 99 */

int main(void)

randomize();

printf("random number in the 0-99 range: %d", random (100));

return 0;

Third floor. In some C, the library function has the functions random and randomize.

For example, the famous turbo

But djgpp doesn't have either of these functions.

The random function is used as follows:Operating Equipment: Dell laptops.

Operating system: win10

Operating procedure: excel2019

1. Open the Excel** that needs to be processed, as shown in the following figure:

2. Click "Formula-Insert Function" in turn to enter the function selection interface, as shown in the following figure

3. Select the "rank" function and click to enter, as shown in the following figure

4. Enter the serial number of the ranked cells in the first row, and select the cells to be ranked in the second row, as shown in the following figure:

5. Place the mouse in the lower right corner of the first cell and pull it to the last cell, as shown in the following figure

math, I think it's here, and in the future, when you think about calculations, you should think of math as a library.

There is a corresponding rand() function, but there is no random.

The rand random number function in the C language is generated in a specified order, before generating the random number, in the header file, the function srand will be initialized, according to the random seed seed, to obtain the random number, if the seed is unchanged, the random number obtained by each run will be the same, therefore, the rand function is also called a pseudorandom number. Let's take a look at the use of rand functions.

01 Open the compiler and enter the fragment shown below.

02 Run the ** fragment and get 10 random numbers, but we find that no matter how many times we run, the generated random numbers are these 10, that is, under the condition that the seed seed remains unchanged, the generated random numbers are pseudo-random numbers.

03 We introduce the header file, take the timestamp as the value of the seed, change the fragment as follows, and change srand(1) to srand(time(null)).

04 Run**, get 10 random numbers as follows, define the srand parameter of the non-constant, you can avoid the generation of pseudo-random numbers.