rand()是表示产生随机数的一种函数，多应用于循环语句当中进行判断。比如说n=rand()；switch（n）{case1...case2...} 这些都是都可能被执行的，因为数字是随机的。
printf("\n");// Usually, you will want to generate a number in a specific range,// such as 0 to 100, like this:{int RANGE_MIN = 0;int RANGE_MAX = 100;for (i = 0; i < 10; i++ ){int rand100 = (((double) rand() /(double) RAND_MAX) * RANGE_MAX + R...
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rand() );}void RangedRandDemo( int range_min, int range_max, int n ){// Generate random numbers in the half-closed interval// [range_min, range_max). In other words,// range_min <= random number < range_maxint i;for ( i = 0; i < n; i++ ){int u = (doubl...
rand() );}void RangedRandDemo( int range_min, int range_max, int n ){// Generate random numbers in the half-closed interval// [range_min, range_max). In other words,// range_min <= random number < range_maxint i;for ( i = 0; i < n; i++ ){int u = (doubl...
rand()函数是产生随机数的一个随机函数。C语言里还有 srand()函数等。详述rand（）(1)使用该函数首先应在开头包含头文件stdlib.h #includ e<stdlib.h> (2)在标准的C库中函数ra nd()可以生成0~RAND_M AX之间的一个随机数，其中RAN...
// Usually, you will want to generate a number in a specific range, // such as 0 to 100, like this: { int RANGE_MIN = 0; int RANGE_MAX = 100; for (i = 0; i < 10; i++ ) { int rand100 = (((double) rand() / (double) RAND_MAX) * RANGE_MAX + RANGE_MIN); printf...
Usearc4random_uniform(3)to generate a random number in the range of a non-empty array. Objective-C if ([array count] > 0) { id obj = array[arc4random_uniform([array count])]; } How Do I Randomly Order anNSArray? Objective-C ...
// Usually, you will want to generate a number in a specific range,// such as 0 to 100, like this:{ int RANGE_MIN = 0;int RANGE_MAX = 100;for (i = 0; i < 10; i++ ){ int rand100 = (((double) rand() / (double) RAND_MAX) * RANGE_MAX + RANGE_MIN);...
rand function returns a pseudorandom integer in the range 0 to RAND_MAX (32767). Use the srand function to seed the pseudorandom-number generator before calling rand.Required header:<stdlib.h>Example复制代码// crt_rand.c// This program seeds the random-number generator// with ...