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。

函数#

The random library includes the following functions:

  • rand — Returns a random integer.

  • srand — Sets the random seed.

rand#

返回一个最大为 32,767 的随机整数。

Available Functions
int rand();

Parameters

此函数不接受任何参数。

Return Values

返回 0 到 32767 之间的随机整数。

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);

srand#

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

类型

描述

seed

unsigned int

初始种子值。

Return Values

此函数不返回值。

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