随机的 #

介绍 #

C++标准库提供了生成伪随机数的函数。这些函数可用于VEXcode V5中需要变化性或随机性的行为。

The random library includes the following functions:

Returns a random integer with no maximum.

Available Functions

int rand();

Parameters

This function does not accept any parameters.

Return Values

Returns a random integer between 0 and 32767.

Notes

To return a random integer within an exclusive limit, use the pattern rand() % max.
To return a random integer within a specific range, use the pattern rand() % (max - min + 1) + min.

Examples

// Display a random number
Brain.Screen.print("%d", rand());

// Display a random number between 0 and 100
Brain.Screen.print("%d", rand() % 101);

// Display a random number between 5 and 10
Brain.Screen.print("%d", rand() % (10 - 5 + 1) + 5);

Sets the seed to be used by the pseudo-random number generator in the rand function.

Available Functions

void srand( unsigned int seed );

Parameters

范围	Type	描述
`seed`	`unsigned int`	初始种子值。

Return Values

This function does not return a value.

Examples

// Use the same seed for random number
srand(1);
Brain.Screen.print("%d", rand() % 100);