如何生成1-10之间的随机数？

Question

是否有可能生成1-10之间的随机数,但它不应该是5？

Answer 1

#include <stdlib.h>

// ...

int i;

do {
   i = rand() % 10 + 1; // generate random number from 1 to 10
} while (i == 5);       // repeat until number != 5

Answer 2

int x = arc4random()%9;
x += x>=4? 2 : 1