如何从一组数字(不是范围)中生成一个随机数
问题描述：
我希望能够从一组数字中生成一个随机数，例如:1, 2, 3, 12, 11, 23, 45, 54, 10, 10, 12, 23, 35,24. 使用 rand 和 srand 我可以每次生成不同的随机数，但我希望能够通过从一组中生成随机数来调节结果.
I would like to be able to generate a random number from a group of numbers, like for example: 1, 2, 3, 12, 11, 23, 45, 54, 10, 10, 12, 23, 35, 24. Using the rand and the srand i can generate random numbers different each time but i would like to able to condition the outcomes by generating random numbers from a group.
答
示例代码
取数组
int a[]={ 1, 2, 3, 12, 11, 23, 45, 54, 10, 10, 12, 23, 35, 24};
int i = rand()%14; // here 14 is number of element in array.
i 将接收一个介于 0 到 13
之间的值最后
i will receive a value between 0 to 13
At last
printf("%d",a[i]); //print that array index